The Tor Browser: b2g/chrome/content/shell.js@129ffea94266 (annotated)

b2g/chrome/content/shell.js@129ffea94266 (annotated)

b2g/chrome/content/shell.js

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 Cu.import('resource://gre/modules/ContactService.jsm');
 Cu.import('resource://gre/modules/SettingsChangeNotifier.jsm');
 Cu.import('resource://gre/modules/DataStoreChangeNotifier.jsm');
 Cu.import('resource://gre/modules/AlarmService.jsm');
 Cu.import('resource://gre/modules/ActivitiesService.jsm');
 Cu.import('resource://gre/modules/PermissionPromptHelper.jsm');
 Cu.import('resource://gre/modules/NotificationDB.jsm');
 Cu.import('resource://gre/modules/Payment.jsm');
 Cu.import("resource://gre/modules/AppsUtils.jsm");
 Cu.import('resource://gre/modules/UserAgentOverrides.jsm');
 Cu.import('resource://gre/modules/Keyboard.jsm');
 Cu.import('resource://gre/modules/ErrorPage.jsm');
 #ifdef MOZ_WIDGET_GONK
 Cu.import('resource://gre/modules/NetworkStatsService.jsm');
 #endif
 // Identity
 Cu.import('resource://gre/modules/SignInToWebsite.jsm');
 SignInToWebsiteController.init();
 #ifdef MOZ_SERVICES_FXACCOUNTS
 Cu.import('resource://gre/modules/FxAccountsMgmtService.jsm');
 #endif
 Cu.import('resource://gre/modules/DownloadsAPI.jsm');
 XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
                                   "resource://gre/modules/SystemAppProxy.jsm");
 Cu.import('resource://gre/modules/Webapps.jsm');
 DOMApplicationRegistry.allAppsLaunchable = true;
 XPCOMUtils.defineLazyServiceGetter(Services, 'env',
                                    '@mozilla.org/process/environment;1',
                                    'nsIEnvironment');
 XPCOMUtils.defineLazyServiceGetter(Services, 'ss',
                                    '@mozilla.org/content/style-sheet-service;1',
                                    'nsIStyleSheetService');
 XPCOMUtils.defineLazyServiceGetter(this, 'gSystemMessenger',
                                    '@mozilla.org/system-message-internal;1',
                                    'nsISystemMessagesInternal');
 XPCOMUtils.defineLazyServiceGetter(Services, 'fm',
                                    '@mozilla.org/focus-manager;1',
                                    'nsIFocusManager');
 XPCOMUtils.defineLazyGetter(this, 'DebuggerServer', function() {
   Cu.import('resource://gre/modules/devtools/dbg-server.jsm');
   return DebuggerServer;
 });
 XPCOMUtils.defineLazyGetter(this, "ppmm", function() {
   return Cc["@mozilla.org/parentprocessmessagemanager;1"]
          .getService(Ci.nsIMessageListenerManager);
 });
 #ifdef MOZ_WIDGET_GONK
 XPCOMUtils.defineLazyGetter(this, "libcutils", function () {
   Cu.import("resource://gre/modules/systemlibs.js");
   return libcutils;
 });
 #endif
 #ifdef MOZ_CAPTIVEDETECT
 XPCOMUtils.defineLazyServiceGetter(Services, 'captivePortalDetector',
                                   '@mozilla.org/toolkit/captive-detector;1',
                                   'nsICaptivePortalDetector');
 #endif
 function getContentWindow() {
   return shell.contentBrowser.contentWindow;
 }
 function debug(str) {
   dump(' -*- Shell.js: ' + str + '\n');
 }
 #ifdef MOZ_CRASHREPORTER
 function debugCrashReport(aStr) {
   dump('Crash reporter : ' + aStr);
 }
 #else
 function debugCrashReport(aStr) {}
 #endif
 var shell = {
   get CrashSubmit() {
     delete this.CrashSubmit;
 #ifdef MOZ_CRASHREPORTER
     Cu.import("resource://gre/modules/CrashSubmit.jsm", this);
     return this.CrashSubmit;
 #else
     dump('Crash reporter : disabled at build time.');
     return this.CrashSubmit = null;
 #endif
   },
   onlineForCrashReport: function shell_onlineForCrashReport() {
     let wifiManager = navigator.mozWifiManager;
     let onWifi = (wifiManager &&
                   (wifiManager.connection.status == 'connected'));
     return !Services.io.offline && onWifi;
   },
   reportCrash: function shell_reportCrash(isChrome, aCrashID) {
     let crashID = aCrashID;
     try {
       // For chrome crashes, we want to report the lastRunCrashID.
       if (isChrome) {
         crashID = Cc["@mozilla.org/xre/app-info;1"]
                     .getService(Ci.nsIXULRuntime).lastRunCrashID;
       }
     } catch(e) {
       debugCrashReport('Failed to fetch crash id. Crash ID is "' + crashID
                        + '" Exception: ' + e);
     }
     // Bail if there isn't a valid crashID.
     if (!this.CrashSubmit || !crashID && !this.CrashSubmit.pendingIDs().length) {
       return;
     }
     // purge the queue.
     this.CrashSubmit.pruneSavedDumps();
     // check for environment affecting crash reporting
     let env = Cc["@mozilla.org/process/environment;1"]
                 .getService(Ci.nsIEnvironment);
     let shutdown = env.get("MOZ_CRASHREPORTER_SHUTDOWN");
     if (shutdown) {
       let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
                          .getService(Ci.nsIAppStartup);
       appStartup.quit(Ci.nsIAppStartup.eForceQuit);
     }
     let noReport = env.get("MOZ_CRASHREPORTER_NO_REPORT");
     if (noReport) {
       return;
     }
     try {
       // Check if we should automatically submit this crash.
       if (Services.prefs.getBoolPref('app.reportCrashes')) {
         this.submitCrash(crashID);
       } else {
         this.deleteCrash(crashID);
       }
     } catch (e) {
       debugCrashReport('Can\'t fetch app.reportCrashes. Exception: ' + e);
     }
     // We can get here if we're just submitting old pending crashes.
     // Check that there's a valid crashID so that we only notify the
     // user if a crash just happened and not when we OOM. Bug 829477
     if (crashID) {
       this.sendChromeEvent({
         type: "handle-crash",
         crashID: crashID,
         chrome: isChrome
       });
     }
   },
   deleteCrash: function shell_deleteCrash(aCrashID) {
     if (aCrashID) {
       debugCrashReport('Deleting pending crash: ' + aCrashID);
       shell.CrashSubmit.delete(aCrashID);
     }
   },
   // this function submit the pending crashes.
   // make sure you are online.
   submitQueuedCrashes: function shell_submitQueuedCrashes() {
     // submit the pending queue.
     let pending = shell.CrashSubmit.pendingIDs();
     for (let crashid of pending) {
       debugCrashReport('Submitting crash: ' + crashid);
       shell.CrashSubmit.submit(crashid);
     }
   },
   // This function submits a crash when we're online.
   submitCrash: function shell_submitCrash(aCrashID) {
     if (this.onlineForCrashReport()) {
       this.submitQueuedCrashes();
       return;
     }
     debugCrashReport('Not online, postponing.');
     Services.obs.addObserver(function observer(subject, topic, state) {
       let network = subject.QueryInterface(Ci.nsINetworkInterface);
       if (network.state == Ci.nsINetworkInterface.NETWORK_STATE_CONNECTED
           && network.type == Ci.nsINetworkInterface.NETWORK_TYPE_WIFI) {
         shell.submitQueuedCrashes();
         Services.obs.removeObserver(observer, topic);
       }
     }, "network-connection-state-changed", false);
   },
   get contentBrowser() {
     delete this.contentBrowser;
     return this.contentBrowser = document.getElementById('systemapp');
   },
   get homeURL() {
     try {
       let homeSrc = Services.env.get('B2G_HOMESCREEN');
       if (homeSrc)
         return homeSrc;
     } catch (e) {}
     return Services.prefs.getCharPref('browser.homescreenURL');
   },
   get manifestURL() {
     return Services.prefs.getCharPref('browser.manifestURL');
   },
   _started: false,
   hasStarted: function shell_hasStarted() {
     return this._started;
   },
   start: function shell_start() {
     this._started = true;
     // This forces the initialization of the cookie service before we hit the
     // network.
     // See bug 810209
     let cookies = Cc["@mozilla.org/cookieService;1"];
     try {
       let cr = Cc["@mozilla.org/xre/app-info;1"]
                  .getService(Ci.nsICrashReporter);
       // Dogfood id. We might want to remove it in the future.
       // see bug 789466
       try {
         let dogfoodId = Services.prefs.getCharPref('prerelease.dogfood.id');
         if (dogfoodId != "") {
           cr.annotateCrashReport("Email", dogfoodId);
         }
       }
       catch (e) { }
 #ifdef MOZ_WIDGET_GONK
       // Annotate crash report
       let annotations = [ [ "Android_Hardware",     "ro.hardware" ],
                           [ "Android_Device",       "ro.product.device" ],
                           [ "Android_CPU_ABI2",     "ro.product.cpu.abi2" ],
                           [ "Android_CPU_ABI",      "ro.product.cpu.abi" ],
                           [ "Android_Manufacturer", "ro.product.manufacturer" ],
                           [ "Android_Brand",        "ro.product.brand" ],
                           [ "Android_Model",        "ro.product.model" ],
                           [ "Android_Board",        "ro.product.board" ],
         ];
       annotations.forEach(function (element) {
           cr.annotateCrashReport(element[0], libcutils.property_get(element[1]));
         });
       let androidVersion = libcutils.property_get("ro.build.version.sdk") +
                            "(" + libcutils.property_get("ro.build.version.codename") + ")";
       cr.annotateCrashReport("Android_Version", androidVersion);
       SettingsListener.observe("deviceinfo.os", "", function(value) {
         try {
           let cr = Cc["@mozilla.org/xre/app-info;1"]
                      .getService(Ci.nsICrashReporter);
           cr.annotateCrashReport("B2G_OS_Version", value);
         } catch(e) { }
       });
 #endif
     } catch(e) {
       debugCrashReport('exception: ' + e);
     }
     let homeURL = this.homeURL;
     if (!homeURL) {
       let msg = 'Fatal error during startup: No homescreen found: try setting B2G_HOMESCREEN';
       alert(msg);
       return;
     }
     let manifestURL = this.manifestURL;
     // <html:iframe id="systemapp"
     //              mozbrowser="true" allowfullscreen="true"
     //              style="overflow: hidden; height: 100%; width: 100%; border: none;"
     //              src="data:text/html;charset=utf-8,%3C!DOCTYPE html>%3Cbody style='background:black;'>"/>
     let systemAppFrame =
       document.createElementNS('http://www.w3.org/1999/xhtml', 'html:iframe');
     systemAppFrame.setAttribute('id', 'systemapp');
     systemAppFrame.setAttribute('mozbrowser', 'true');
     systemAppFrame.setAttribute('mozapp', manifestURL);
     systemAppFrame.setAttribute('allowfullscreen', 'true');
     systemAppFrame.setAttribute('style', "overflow: hidden; height: 100%; width: 100%; border: none;");
     systemAppFrame.setAttribute('src', "data:text/html;charset=utf-8,%3C!DOCTYPE html>%3Cbody style='background:black;");
     let container = document.getElementById('container');
 #ifdef MOZ_WIDGET_COCOA
     // See shell.html
     let hotfix = document.getElementById('placeholder');
     if (hotfix) {
       container.removeChild(hotfix);
     }
 #endif
     container.appendChild(systemAppFrame);
     systemAppFrame.contentWindow
                   .QueryInterface(Ci.nsIInterfaceRequestor)
                   .getInterface(Ci.nsIWebNavigation)
                   .sessionHistory = Cc["@mozilla.org/browser/shistory;1"]
                                       .createInstance(Ci.nsISHistory);
     // On firefox mulet, shell.html is loaded in a tab
     // and we have to listen on the chrome event handler
     // to catch key events
     let chromeEventHandler = window.QueryInterface(Ci.nsIInterfaceRequestor)
                                    .getInterface(Ci.nsIWebNavigation)
                                    .QueryInterface(Ci.nsIDocShell)
                                    .chromeEventHandler || window;
     // Capture all key events so we can filter out hardware buttons
     // And send them to Gaia via mozChromeEvents.
     // Ideally, hardware buttons wouldn't generate key events at all, or
     // if they did, they would use keycodes that conform to DOM 3 Events.
     // See discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=762362
     chromeEventHandler.addEventListener('keydown', this, true);
     chromeEventHandler.addEventListener('keypress', this, true);
     chromeEventHandler.addEventListener('keyup', this, true);
     window.addEventListener('MozApplicationManifest', this);
     window.addEventListener('mozfullscreenchange', this);
     window.addEventListener('MozAfterPaint', this);
     window.addEventListener('sizemodechange', this);
     window.addEventListener('unload', this);
     this.contentBrowser.addEventListener('mozbrowserloadstart', this, true);
     SystemAppProxy.registerFrame(this.contentBrowser);
     CustomEventManager.init();
     WebappsHelper.init();
     UserAgentOverrides.init();
     IndexedDBPromptHelper.init();
     CaptivePortalLoginHelper.init();
     this.contentBrowser.src = homeURL;
     this.isHomeLoaded = false;
     ppmm.addMessageListener("content-handler", this);
     ppmm.addMessageListener("dial-handler", this);
     ppmm.addMessageListener("sms-handler", this);
     ppmm.addMessageListener("mail-handler", this);
     ppmm.addMessageListener("app-notification-send", AlertsHelper);
     ppmm.addMessageListener("file-picker", this);
     ppmm.addMessageListener("getProfD", function(message) {
       return Services.dirsvc.get("ProfD", Ci.nsIFile).path;
     });
   },
   stop: function shell_stop() {
     window.removeEventListener('unload', this);
     window.removeEventListener('keydown', this, true);
     window.removeEventListener('keypress', this, true);
     window.removeEventListener('keyup', this, true);
     window.removeEventListener('MozApplicationManifest', this);
     window.removeEventListener('mozfullscreenchange', this);
     window.removeEventListener('sizemodechange', this);
     this.contentBrowser.removeEventListener('mozbrowserloadstart', this, true);
     ppmm.removeMessageListener("content-handler", this);
     if (this.timer) {
       this.timer.cancel();
       this.timer = null;
     }
     UserAgentOverrides.uninit();
     IndexedDBPromptHelper.uninit();
   },
   // If this key event actually represents a hardware button, filter it here
   // and send a mozChromeEvent with detail.type set to xxx-button-press or
   // xxx-button-release instead.
   filterHardwareKeys: function shell_filterHardwareKeys(evt) {
     var type;
     switch (evt.keyCode) {
       case evt.DOM_VK_HOME:         // Home button
         type = 'home-button';
         break;
       case evt.DOM_VK_SLEEP:        // Sleep button
       case evt.DOM_VK_END:          // On desktop we don't have a sleep button
         type = 'sleep-button';
         break;
       case evt.DOM_VK_PAGE_UP:      // Volume up button
         type = 'volume-up-button';
         break;
       case evt.DOM_VK_PAGE_DOWN:    // Volume down button
         type = 'volume-down-button';
         break;
       case evt.DOM_VK_ESCAPE:       // Back button (should be disabled)
         type = 'back-button';
         break;
       case evt.DOM_VK_CONTEXT_MENU: // Menu button
         type = 'menu-button';
         break;
       case evt.DOM_VK_F1: // headset button
         type = 'headset-button';
         break;
     }
     let mediaKeys = {
       'MediaNextTrack': 'media-next-track-button',
       'MediaPreviousTrack': 'media-previous-track-button',
       'MediaPause': 'media-pause-button',
       'MediaPlay': 'media-play-button',
       'MediaPlayPause': 'media-play-pause-button',
       'MediaStop': 'media-stop-button',
       'MediaRewind': 'media-rewind-button',
       'FastFwd': 'media-fast-forward-button'
     };
     let isMediaKey = false;
     if (mediaKeys[evt.key]) {
       isMediaKey = true;
       type = mediaKeys[evt.key];
     }
     if (!type) {
       return;
     }
     // If we didn't return, then the key event represents a hardware key
     // and we need to prevent it from propagating to Gaia
     evt.stopImmediatePropagation();
     evt.preventDefault(); // Prevent keypress events (when #501496 is fixed).
     // If it is a key down or key up event, we send a chrome event to Gaia.
     // If it is a keypress event we just ignore it.
     switch (evt.type) {
       case 'keydown':
         type = type + '-press';
         break;
       case 'keyup':
         type = type + '-release';
         break;
       case 'keypress':
         return;
     }
     // Let applications receive the headset button key press/release event.
     if (evt.keyCode == evt.DOM_VK_F1 && type !== this.lastHardwareButtonEventType) {
       this.lastHardwareButtonEventType = type;
       gSystemMessenger.broadcastMessage('headset-button', type);
       return;
     }
     if (isMediaKey) {
       this.lastHardwareButtonEventType = type;
       gSystemMessenger.broadcastMessage('media-button', type);
       return;
     }
     // On my device, the physical hardware buttons (sleep and volume)
     // send multiple events (press press release release), but the
     // soft home button just sends one.  This hack is to manually
     // "debounce" the keys. If the type of this event is the same as
     // the type of the last one, then don't send it.  We'll never send
     // two presses or two releases in a row.
     // FIXME: https://bugzilla.mozilla.org/show_bug.cgi?id=761067
     if (type !== this.lastHardwareButtonEventType) {
       this.lastHardwareButtonEventType = type;
       this.sendChromeEvent({type: type});
     }
   },
   lastHardwareButtonEventType: null, // property for the hack above
   needBufferOpenAppReq: true,
   bufferedOpenAppReqs: [],
   timer: null,
   visibleNormalAudioActive: false,
   handleEvent: function shell_handleEvent(evt) {
     let content = this.contentBrowser.contentWindow;
     switch (evt.type) {
       case 'keydown':
       case 'keyup':
       case 'keypress':
         this.filterHardwareKeys(evt);
         break;
       case 'mozfullscreenchange':
         // When the screen goes fullscreen make sure to set the focus to the
         // main window so noboby can prevent the ESC key to get out fullscreen
         // mode
         if (document.mozFullScreen)
           Services.fm.focusedWindow = window;
         break;
       case 'sizemodechange':
         if (window.windowState == window.STATE_MINIMIZED && !this.visibleNormalAudioActive) {
           this.contentBrowser.setVisible(false);
         } else {
           this.contentBrowser.setVisible(true);
         }
         break;
       case 'mozbrowserloadstart':
         if (content.document.location == 'about:blank') {
           this.contentBrowser.addEventListener('mozbrowserlocationchange', this, true);
           return;
         }
         this.notifyContentStart();
         break;
       case 'mozbrowserlocationchange':
         if (content.document.location == 'about:blank') {
           return;
         }
         this.notifyContentStart();
        break;
       case 'MozApplicationManifest':
         try {
           if (!Services.prefs.getBoolPref('browser.cache.offline.enable'))
             return;
           let contentWindow = evt.originalTarget.defaultView;
           let documentElement = contentWindow.document.documentElement;
           if (!documentElement)
             return;
           let manifest = documentElement.getAttribute('manifest');
           if (!manifest)
             return;
           let principal = contentWindow.document.nodePrincipal;
           if (Services.perms.testPermissionFromPrincipal(principal, 'offline-app') == Ci.nsIPermissionManager.UNKNOWN_ACTION) {
             if (Services.prefs.getBoolPref('browser.offline-apps.notify')) {
               // FIXME Bug 710729 - Add a UI for offline cache notifications
               return;
             }
             return;
           }
           Services.perms.addFromPrincipal(principal, 'offline-app',
                                           Ci.nsIPermissionManager.ALLOW_ACTION);
           let documentURI = Services.io.newURI(contentWindow.document.documentURI,
                                                null,
                                                null);
           let manifestURI = Services.io.newURI(manifest, null, documentURI);
           let updateService = Cc['@mozilla.org/offlinecacheupdate-service;1']
                               .getService(Ci.nsIOfflineCacheUpdateService);
           updateService.scheduleUpdate(manifestURI, documentURI, window);
         } catch (e) {
           dump('Error while creating offline cache: ' + e + '\n');
         }
         break;
       case 'MozAfterPaint':
         window.removeEventListener('MozAfterPaint', this);
         this.sendChromeEvent({
           type: 'system-first-paint'
         });
         break;
       case 'unload':
         this.stop();
         break;
     }
   },
   // Send an event to a specific window, document or element.
   sendEvent: function shell_sendEvent(target, type, details) {
     let doc = target.document || target.ownerDocument || target;
     let event = doc.createEvent('CustomEvent');
     event.initCustomEvent(type, true, true, details ? details : {});
     target.dispatchEvent(event);
   },
   sendCustomEvent: function shell_sendCustomEvent(type, details) {
     let target = getContentWindow();
     let payload = details ? Cu.cloneInto(details, target) : {};
     this.sendEvent(target, type, payload);
   },
   sendChromeEvent: function shell_sendChromeEvent(details) {
     if (!this.isHomeLoaded) {
       if (!('pendingChromeEvents' in this)) {
         this.pendingChromeEvents = [];
       }
       this.pendingChromeEvents.push(details);
       return;
     }
     this.sendEvent(getContentWindow(), "mozChromeEvent",
                    Cu.cloneInto(details, getContentWindow()));
   },
   openAppForSystemMessage: function shell_openAppForSystemMessage(msg) {
     let payload = {
       url: msg.pageURL,
       manifestURL: msg.manifestURL,
       isActivity: (msg.type == 'activity'),
       onlyShowApp: msg.onlyShowApp,
       showApp: msg.showApp,
       target: msg.target,
       expectingSystemMessage: true,
       extra: msg.extra
     }
     this.sendCustomEvent('open-app', payload);
   },
   receiveMessage: function shell_receiveMessage(message) {
     var activities = { 'content-handler': { name: 'view', response: null },
                        'dial-handler':    { name: 'dial', response: null },
                        'mail-handler':    { name: 'new',  response: null },
                        'sms-handler':     { name: 'new',  response: null },
                        'file-picker':     { name: 'pick', response: 'file-picked' } };
     if (!(message.name in activities))
       return;
     let data = message.data;
     let activity = activities[message.name];
     let a = new MozActivity({
       name: activity.name,
       data: data
     });
     if (activity.response) {
       a.onsuccess = function() {
         let sender = message.target.QueryInterface(Ci.nsIMessageSender);
         sender.sendAsyncMessage(activity.response, { success: true,
                                                      result:  a.result });
       }
       a.onerror = function() {
         let sender = message.target.QueryInterface(Ci.nsIMessageSender);
         sender.sendAsyncMessage(activity.response, { success: false });
       }
     }
   },
   notifyContentStart: function shell_notifyContentStart() {
     this.contentBrowser.removeEventListener('mozbrowserloadstart', this, true);
     this.contentBrowser.removeEventListener('mozbrowserlocationchange', this, true);
     let content = this.contentBrowser.contentWindow;
     this.reportCrash(true);
     this.sendEvent(window, 'ContentStart');
     Services.obs.notifyObservers(null, 'content-start', null);
 #ifdef MOZ_WIDGET_GONK
     Cu.import('resource://gre/modules/OperatorApps.jsm');
 #endif
     content.addEventListener('load', function shell_homeLoaded() {
       content.removeEventListener('load', shell_homeLoaded);
       shell.isHomeLoaded = true;
 #ifdef MOZ_WIDGET_GONK
       libcutils.property_set('sys.boot_completed', '1');
 #endif
       Services.obs.notifyObservers(null, "browser-ui-startup-complete", "");
       SystemAppProxy.setIsReady();
       if ('pendingChromeEvents' in shell) {
         shell.pendingChromeEvents.forEach((shell.sendChromeEvent).bind(shell));
       }
       delete shell.pendingChromeEvents;
     });
   }
 };
 // Listen for the request of opening app and relay them to Gaia.
 Services.obs.addObserver(function onSystemMessageOpenApp(subject, topic, data) {
   let msg = JSON.parse(data);
   // Buffer non-activity request until content starts to load for 10 seconds.
   // We'll revisit this later if new kind of requests don't need to be cached.
   if (shell.needBufferOpenAppReq && msg.type !== 'activity') {
     shell.bufferedOpenAppReqs.push(msg);
     return;
   }
   shell.openAppForSystemMessage(msg);
 }, 'system-messages-open-app', false);
 Services.obs.addObserver(function onInterAppCommConnect(subject, topic, data) {
   data = JSON.parse(data);
   shell.sendChromeEvent({ type: "inter-app-comm-permission",
                           chromeEventID: data.callerID,
                           manifestURL: data.manifestURL,
                           keyword: data.keyword,
                           peers: data.appsToSelect });
 }, 'inter-app-comm-select-app', false);
 Services.obs.addObserver(function onFullscreenOriginChange(subject, topic, data) {
   shell.sendChromeEvent({ type: "fullscreenoriginchange",
                           fullscreenorigin: data });
 }, "fullscreen-origin-change", false);
 DOMApplicationRegistry.registryStarted.then(function () {
   shell.sendChromeEvent({ type: 'webapps-registry-start' });
 });
 DOMApplicationRegistry.registryReady.then(function () {
   shell.sendChromeEvent({ type: 'webapps-registry-ready' });
 });
 Services.obs.addObserver(function onBluetoothVolumeChange(subject, topic, data) {
   shell.sendChromeEvent({
     type: "bluetooth-volumeset",
     value: data
   });
 }, 'bluetooth-volume-change', false);
 Services.obs.addObserver(function(subject, topic, data) {
   shell.sendCustomEvent('mozmemorypressure');
 }, 'memory-pressure', false);
 var CustomEventManager = {
   init: function custevt_init() {
     window.addEventListener("ContentStart", (function(evt) {
       let content = shell.contentBrowser.contentWindow;
       content.addEventListener("mozContentEvent", this, false, true);
       // After content starts to load for 10 seconds, send and
       // clean up the buffered open-app requests if there is any.
       //
       // TODO: Bug 793420 - Remove the waiting timer for the 'open-app'
       //                    mozChromeEvents requested by System Message
       shell.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
       shell.timer.initWithCallback(function timerCallback() {
         shell.bufferedOpenAppReqs.forEach(function bufferOpenAppReq(msg) {
           shell.openAppForSystemMessage(msg);
         });
         shell.bufferedOpenAppReqs.length = 0;
         shell.needBufferOpenAppReq = false;
         shell.timer = null;
       }, 10000, Ci.nsITimer.TYPE_ONE_SHOT);
     }).bind(this), false);
   },
   handleEvent: function custevt_handleEvent(evt) {
     let detail = evt.detail;
     dump('XXX FIXME : Got a mozContentEvent: ' + detail.type + "\n");
     switch(detail.type) {
       case 'desktop-notification-show':
       case 'desktop-notification-click':
       case 'desktop-notification-close':
         AlertsHelper.handleEvent(detail);
         break;
       case 'webapps-install-granted':
       case 'webapps-install-denied':
         WebappsHelper.handleEvent(detail);
         break;
       case 'select-choicechange':
         FormsHelper.handleEvent(detail);
         break;
       case 'system-message-listener-ready':
         Services.obs.notifyObservers(null, 'system-message-listener-ready', null);
         break;
       case 'remote-debugger-prompt':
         RemoteDebugger.handleEvent(detail);
         break;
       case 'captive-portal-login-cancel':
         CaptivePortalLoginHelper.handleEvent(detail);
         break;
       case 'inter-app-comm-permission':
         Services.obs.notifyObservers(null, 'inter-app-comm-select-app-result',
           JSON.stringify({ callerID: detail.chromeEventID,
                            keyword: detail.keyword,
                            manifestURL: detail.manifestURL,
                            selectedApps: detail.peers }));
         break;
       case 'inputmethod-update-layouts':
         KeyboardHelper.handleEvent(detail);
         break;
     }
   }
 }
 var AlertsHelper = {
   _listeners: {},
   _count: 0,
   handleEvent: function alert_handleEvent(detail) {
     if (!detail || !detail.id)
       return;
     let uid = detail.id;
     let listener = this._listeners[uid];
     if (!listener)
      return;
     let topic;
     if (detail.type == "desktop-notification-click") {
       topic = "alertclickcallback";
     } else if (detail.type == "desktop-notification-show") {
       topic = "alertshow";
     } else {
       /* desktop-notification-close */
       topic = "alertfinished";
     }
     if (uid.startsWith("alert")) {
       try {
         listener.observer.observe(null, topic, listener.cookie);
       } catch (e) { }
     } else {
       try {
         listener.mm.sendAsyncMessage("app-notification-return", {
           uid: uid,
           topic: topic,
           target: listener.target
         });
       } catch (e) {
         // we get an exception if the app is not launched yet
         gSystemMessenger.sendMessage("notification", {
             clicked: (detail.type === "desktop-notification-click"),
             title: listener.title,
             body: listener.text,
             imageURL: listener.imageURL,
             lang: listener.lang,
             dir: listener.dir,
             id: listener.id,
             tag: listener.tag
           },
           Services.io.newURI(listener.target, null, null),
           Services.io.newURI(listener.manifestURL, null, null)
         );
       }
     }
     // we're done with this notification
     if (topic === "alertfinished") {
       delete this._listeners[uid];
     }
   },
   registerListener: function alert_registerListener(alertId, cookie, alertListener) {
     this._listeners[alertId] = { observer: alertListener, cookie: cookie };
   },
   registerAppListener: function alert_registerAppListener(uid, listener) {
     this._listeners[uid] = listener;
     let app = DOMApplicationRegistry.getAppByManifestURL(listener.manifestURL);
     DOMApplicationRegistry.getManifestFor(app.manifestURL).then((manifest) => {
       let helper = new ManifestHelper(manifest, app.origin);
       let getNotificationURLFor = function(messages) {
         if (!messages)
           return null;
         for (let i = 0; i < messages.length; i++) {
           let message = messages[i];
           if (message === "notification") {
             return helper.fullLaunchPath();
           } else if (typeof message == "object" && "notification" in message) {
             return helper.resolveFromOrigin(message["notification"]);
           }
         }
         // No message found...
         return null;
       }
       listener.target = getNotificationURLFor(manifest.messages);
       // Bug 816944 - Support notification messages for entry_points.
     });
   },
   showNotification: function alert_showNotification(imageURL,
                                                     title,
                                                     text,
                                                     textClickable,
                                                     cookie,
                                                     uid,
                                                     bidi,
                                                     lang,
                                                     manifestURL) {
     function send(appName, appIcon) {
       shell.sendChromeEvent({
         type: "desktop-notification",
         id: uid,
         icon: imageURL,
         title: title,
         text: text,
         bidi: bidi,
         lang: lang,
         appName: appName,
         appIcon: appIcon,
         manifestURL: manifestURL
       });
     }
     if (!manifestURL || !manifestURL.length) {
       send(null, null);
       return;
     }
     // If we have a manifest URL, get the icon and title from the manifest
     // to prevent spoofing.
     let app = DOMApplicationRegistry.getAppByManifestURL(manifestURL);
     DOMApplicationRegistry.getManifestFor(manifestURL).then((aManifest) => {
       let helper = new ManifestHelper(aManifest, app.origin);
       send(helper.name, helper.iconURLForSize(128));
     });
   },
   showAlertNotification: function alert_showAlertNotification(imageURL,
                                                               title,
                                                               text,
                                                               textClickable,
                                                               cookie,
                                                               alertListener,
                                                               name,
                                                               bidi,
                                                               lang) {
     let currentListener = this._listeners[name];
     if (currentListener) {
       currentListener.observer.observe(null, "alertfinished", currentListener.cookie);
     }
     this.registerListener(name, cookie, alertListener);
     this.showNotification(imageURL, title, text, textClickable, cookie,
                           name, bidi, lang, null);
   },
   closeAlert: function alert_closeAlert(name) {
     shell.sendChromeEvent({
       type: "desktop-notification-close",
       id: name
     });
   },
   receiveMessage: function alert_receiveMessage(aMessage) {
     if (!aMessage.target.assertAppHasPermission("desktop-notification")) {
       Cu.reportError("Desktop-notification message " + aMessage.name +
                      " from a content process with no desktop-notification privileges.");
       return;
     }
     let data = aMessage.data;
     let details = data.details;
     let listener = {
       mm: aMessage.target,
       title: data.title,
       text: data.text,
       manifestURL: details.manifestURL,
       imageURL: data.imageURL,
       lang: details.lang || undefined,
       id: details.id || undefined,
       dir: details.dir || undefined,
       tag: details.tag || undefined
     };
     this.registerAppListener(data.uid, listener);
     this.showNotification(data.imageURL, data.title, data.text,
                           details.textClickable, null,
                           data.uid, details.dir,
                           details.lang, details.manifestURL);
   },
 }
 var WebappsHelper = {
   _installers: {},
   _count: 0,
   init: function webapps_init() {
     Services.obs.addObserver(this, "webapps-launch", false);
     Services.obs.addObserver(this, "webapps-ask-install", false);
     Services.obs.addObserver(this, "webapps-close", false);
   },
   registerInstaller: function webapps_registerInstaller(data) {
     let id = "installer" + this._count++;
     this._installers[id] = data;
     return id;
   },
   handleEvent: function webapps_handleEvent(detail) {
     if (!detail || !detail.id)
       return;
     let installer = this._installers[detail.id];
     delete this._installers[detail.id];
     switch (detail.type) {
       case "webapps-install-granted":
         DOMApplicationRegistry.confirmInstall(installer);
         break;
       case "webapps-install-denied":
         DOMApplicationRegistry.denyInstall(installer);
         break;
     }
   },
   observe: function webapps_observe(subject, topic, data) {
     let json = JSON.parse(data);
     json.mm = subject;
     switch(topic) {
       case "webapps-launch":
         DOMApplicationRegistry.getManifestFor(json.manifestURL).then((aManifest) => {
           if (!aManifest)
             return;
           let manifest = new ManifestHelper(aManifest, json.origin);
           let payload = {
             __exposedProps__: {
               timestamp: "r",
               url: "r",
               manifestURL: "r"
             },
             timestamp: json.timestamp,
             url: manifest.fullLaunchPath(json.startPoint),
             manifestURL: json.manifestURL
           }
           shell.sendEvent(getContentWindow(), "webapps-launch", payload);
         });
         break;
       case "webapps-ask-install":
         let id = this.registerInstaller(json);
         shell.sendChromeEvent({
           type: "webapps-ask-install",
           id: id,
           app: json.app
         });
         break;
       case "webapps-close":
         shell.sendEvent(getContentWindow(), "webapps-close",
           {
             __exposedProps__: { "manifestURL": "r" },
             "manifestURL": json.manifestURL
           });
         break;
     }
   }
 }
 let IndexedDBPromptHelper = {
   _quotaPrompt: "indexedDB-quota-prompt",
   _quotaResponse: "indexedDB-quota-response",
   init:
   function IndexedDBPromptHelper_init() {
     Services.obs.addObserver(this, this._quotaPrompt, false);
   },
   uninit:
   function IndexedDBPromptHelper_uninit() {
     Services.obs.removeObserver(this, this._quotaPrompt);
   },
   observe:
   function IndexedDBPromptHelper_observe(subject, topic, data) {
     if (topic != this._quotaPrompt) {
       throw new Error("Unexpected topic!");
     }
     let observer = subject.QueryInterface(Ci.nsIInterfaceRequestor)
                           .getInterface(Ci.nsIObserver);
     let responseTopic = this._quotaResponse;
     setTimeout(function() {
       observer.observe(null, responseTopic,
                        Ci.nsIPermissionManager.DENY_ACTION);
     }, 0);
   }
 }
 let RemoteDebugger = {
   _promptDone: false,
   _promptAnswer: false,
   _running: false,
   prompt: function debugger_prompt() {
     this._promptDone = false;
     shell.sendChromeEvent({
       "type": "remote-debugger-prompt"
     });
     while(!this._promptDone) {
       Services.tm.currentThread.processNextEvent(true);
     }
     return this._promptAnswer;
   },
   handleEvent: function debugger_handleEvent(detail) {
     this._promptAnswer = detail.value;
     this._promptDone = true;
   },
   get isDebugging() {
     if (!this._running) {
       return false;
     }
     return DebuggerServer._connections &&
            Object.keys(DebuggerServer._connections).length > 0;
   },
   // Start the debugger server.
   start: function debugger_start() {
     if (this._running) {
       return;
     }
     if (!DebuggerServer.initialized) {
       // Ask for remote connections.
       DebuggerServer.init(this.prompt.bind(this));
       // /!\ Be careful when adding a new actor, especially global actors.
       // Any new global actor will be exposed and returned by the root actor.
       // Add Firefox-specific actors, but prevent tab actors to be loaded in
       // the parent process, unless we enable certified apps debugging.
       let restrictPrivileges = Services.prefs.getBoolPref("devtools.debugger.forbid-certified-apps");
       DebuggerServer.addBrowserActors("navigator:browser", restrictPrivileges);
       /**
        * Construct a root actor appropriate for use in a server running in B2G.
        * The returned root actor respects the factories registered with
        * DebuggerServer.addGlobalActor only if certified apps debugging is on,
        * otherwise we used an explicit limited list of global actors
        *
        * * @param connection DebuggerServerConnection
        *        The conection to the client.
        */
       DebuggerServer.createRootActor = function createRootActor(connection)
       {
         let { Promise: promise } = Cu.import("resource://gre/modules/Promise.jsm", {});
         let parameters = {
           // We do not expose browser tab actors yet,
           // but we still have to define tabList.getList(),
           // otherwise, client won't be able to fetch global actors
           // from listTabs request!
           tabList: {
             getList: function() {
               return promise.resolve([]);
             }
           },
           // Use an explicit global actor list to prevent exposing
           // unexpected actors
           globalActorFactories: restrictPrivileges ? {
             webappsActor: DebuggerServer.globalActorFactories.webappsActor,
             deviceActor: DebuggerServer.globalActorFactories.deviceActor,
           } : DebuggerServer.globalActorFactories
         };
         let root = new DebuggerServer.RootActor(connection, parameters);
         root.applicationType = "operating-system";
         return root;
       };
 #ifdef MOZ_WIDGET_GONK
       DebuggerServer.on("connectionchange", function() {
         AdbController.updateState();
       });
 #endif
     }
     let path = Services.prefs.getCharPref("devtools.debugger.unix-domain-socket") ||
                "/data/local/debugger-socket";
     try {
       DebuggerServer.openListener(path);
       // Temporary event, until bug 942756 lands and offers a way to know
       // when the server is up and running.
       Services.obs.notifyObservers(null, 'debugger-server-started', null);
       this._running = true;
     } catch (e) {
       dump('Unable to start debugger server: ' + e + '\n');
     }
   },
   stop: function debugger_stop() {
     if (!this._running) {
       return;
     }
     if (!DebuggerServer.initialized) {
       // Can this really happen if we are running?
       this._running = false;
       return;
     }
     try {
       DebuggerServer.closeListener();
     } catch (e) {
       dump('Unable to stop debugger server: ' + e + '\n');
     }
     this._running = false;
   }
 }
 let KeyboardHelper = {
   handleEvent: function keyboard_handleEvent(detail) {
     Keyboard.setLayouts(detail.layouts);
   }
 };
 // This is the backend for Gaia's screenshot feature.  Gaia requests a
 // screenshot by sending a mozContentEvent with detail.type set to
 // 'take-screenshot'.  Then we take a screenshot and send a
 // mozChromeEvent with detail.type set to 'take-screenshot-success'
 // and detail.file set to the an image/png blob
 window.addEventListener('ContentStart', function ss_onContentStart() {
   let content = shell.contentBrowser.contentWindow;
   content.addEventListener('mozContentEvent', function ss_onMozContentEvent(e) {
     if (e.detail.type !== 'take-screenshot')
       return;
     try {
       var canvas = document.createElementNS('http://www.w3.org/1999/xhtml',
                                             'canvas');
       var width = window.innerWidth;
       var height = window.innerHeight;
       var scale = window.devicePixelRatio;
       canvas.setAttribute('width', width * scale);
       canvas.setAttribute('height', height * scale);
       var context = canvas.getContext('2d');
       var flags =
         context.DRAWWINDOW_DRAW_CARET |
         context.DRAWWINDOW_DRAW_VIEW |
         context.DRAWWINDOW_USE_WIDGET_LAYERS;
       context.scale(scale, scale);
       context.drawWindow(window, 0, 0, width, height,
                          'rgb(255,255,255)', flags);
       // I can't use sendChromeEvent() here because it doesn't wrap
       // the blob in the detail object correctly. So I use __exposedProps__
       // instead to safely send the chrome detail object to content.
       shell.sendEvent(getContentWindow(), 'mozChromeEvent', {
         __exposedProps__: { type: 'r', file: 'r' },
         type: 'take-screenshot-success',
         file: canvas.mozGetAsFile('screenshot', 'image/png')
       });
     } catch (e) {
       dump('exception while creating screenshot: ' + e + '\n');
       shell.sendChromeEvent({
         type: 'take-screenshot-error',
         error: String(e)
       });
     }
   });
 });
 (function contentCrashTracker() {
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
       let props = aSubject.QueryInterface(Ci.nsIPropertyBag2);
       if (props.hasKey("abnormal") && props.hasKey("dumpID")) {
         shell.reportCrash(false, props.getProperty("dumpID"));
       }
     },
     "ipc:content-shutdown", false);
 })();
 var CaptivePortalLoginHelper = {
   init: function init() {
     Services.obs.addObserver(this, 'captive-portal-login', false);
     Services.obs.addObserver(this, 'captive-portal-login-abort', false);
   },
   handleEvent: function handleEvent(detail) {
     Services.captivePortalDetector.cancelLogin(detail.id);
   },
   observe: function observe(subject, topic, data) {
     shell.sendChromeEvent(JSON.parse(data));
   }
 }
 // Listen for crashes submitted through the crash reporter UI.
 window.addEventListener('ContentStart', function cr_onContentStart() {
   let content = shell.contentBrowser.contentWindow;
   content.addEventListener("mozContentEvent", function cr_onMozContentEvent(e) {
     if (e.detail.type == "submit-crash" && e.detail.crashID) {
       debugCrashReport("submitting crash at user request ", e.detail.crashID);
       shell.submitCrash(e.detail.crashID);
     } else if (e.detail.type == "delete-crash" && e.detail.crashID) {
       debugCrashReport("deleting crash at user request ", e.detail.crashID);
       shell.deleteCrash(e.detail.crashID);
     }
   });
 });
 window.addEventListener('ContentStart', function update_onContentStart() {
   Cu.import('resource://gre/modules/WebappsUpdater.jsm');
   WebappsUpdater.handleContentStart(shell);
   let promptCc = Cc["@mozilla.org/updates/update-prompt;1"];
   if (!promptCc) {
     return;
   }
   let updatePrompt = promptCc.createInstance(Ci.nsIUpdatePrompt);
   if (!updatePrompt) {
     return;
   }
   updatePrompt.wrappedJSObject.handleContentStart(shell);
 });
 (function geolocationStatusTracker() {
   let gGeolocationActive = false;
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     let oldState = gGeolocationActive;
     if (aData == "starting") {
       gGeolocationActive = true;
     } else if (aData == "shutdown") {
       gGeolocationActive = false;
     }
     if (gGeolocationActive != oldState) {
       shell.sendChromeEvent({
         type: 'geolocation-status',
         active: gGeolocationActive
       });
     }
 }, "geolocation-device-events", false);
 })();
 (function headphonesStatusTracker() {
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     shell.sendChromeEvent({
       type: 'headphones-status-changed',
       state: aData
     });
 }, "headphones-status-changed", false);
 })();
 (function audioChannelChangedTracker() {
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     shell.sendChromeEvent({
       type: 'audio-channel-changed',
       channel: aData
     });
 }, "audio-channel-changed", false);
 })();
 (function defaultVolumeChannelChangedTracker() {
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     shell.sendChromeEvent({
       type: 'default-volume-channel-changed',
       channel: aData
     });
 }, "default-volume-channel-changed", false);
 })();
 (function visibleAudioChannelChangedTracker() {
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     shell.sendChromeEvent({
       type: 'visible-audio-channel-changed',
       channel: aData
     });
     shell.visibleNormalAudioActive = (aData == 'normal');
 }, "visible-audio-channel-changed", false);
 })();
 (function recordingStatusTracker() {
   // Recording status is tracked per process with following data structure:
   // {<processId>: {<requestURL>: {isApp: <isApp>,
   //                               count: <N>,
   //                               audioCount: <N>,
   //                               videoCount: <N>}}
   let gRecordingActiveProcesses = {};
   let recordingHandler = function(aSubject, aTopic, aData) {
     let props = aSubject.QueryInterface(Ci.nsIPropertyBag2);
     let processId = (props.hasKey('childID')) ? props.get('childID')
                                               : 'main';
     if (processId && !gRecordingActiveProcesses.hasOwnProperty(processId)) {
       gRecordingActiveProcesses[processId] = {};
     }
     let commandHandler = function (requestURL, command) {
       let currentProcess = gRecordingActiveProcesses[processId];
       let currentActive = currentProcess[requestURL];
       let wasActive = (currentActive['count'] > 0);
       let wasAudioActive = (currentActive['audioCount'] > 0);
       let wasVideoActive = (currentActive['videoCount'] > 0);
       switch (command.type) {
         case 'starting':
           currentActive['count']++;
           currentActive['audioCount'] += (command.isAudio) ? 1 : 0;
           currentActive['videoCount'] += (command.isVideo) ? 1 : 0;
           break;
         case 'shutdown':
           currentActive['count']--;
           currentActive['audioCount'] -= (command.isAudio) ? 1 : 0;
           currentActive['videoCount'] -= (command.isVideo) ? 1 : 0;
           break;
         case 'content-shutdown':
           currentActive['count'] = 0;
           currentActive['audioCount'] = 0;
           currentActive['videoCount'] = 0;
           break;
       }
       if (currentActive['count'] > 0) {
         currentProcess[requestURL] = currentActive;
       } else {
         delete currentProcess[requestURL];
       }
       // We need to track changes if any active state is changed.
       let isActive = (currentActive['count'] > 0);
       let isAudioActive = (currentActive['audioCount'] > 0);
       let isVideoActive = (currentActive['videoCount'] > 0);
       if ((isActive != wasActive) ||
           (isAudioActive != wasAudioActive) ||
           (isVideoActive != wasVideoActive)) {
         shell.sendChromeEvent({
           type: 'recording-status',
           active: isActive,
           requestURL: requestURL,
           isApp: currentActive['isApp'],
           isAudio: isAudioActive,
           isVideo: isVideoActive
         });
       }
     };
     switch (aData) {
       case 'starting':
       case 'shutdown':
         // create page record if it is not existed yet.
         let requestURL = props.get('requestURL');
         if (requestURL &&
             !gRecordingActiveProcesses[processId].hasOwnProperty(requestURL)) {
           gRecordingActiveProcesses[processId][requestURL] = {isApp: props.get('isApp'),
                                                               count: 0,
                                                               audioCount: 0,
                                                               videoCount: 0};
         }
         commandHandler(requestURL, { type: aData,
                                      isAudio: props.get('isAudio'),
                                      isVideo: props.get('isVideo')});
         break;
       case 'content-shutdown':
         // iterate through all the existing active processes
         Object.keys(gRecordingActiveProcesses[processId]).forEach(function(requestURL) {
           commandHandler(requestURL, { type: aData,
                                        isAudio: true,
                                        isVideo: true});
         });
         break;
     }
     // clean up process record if no page record in it.
     if (Object.keys(gRecordingActiveProcesses[processId]).length == 0) {
       delete gRecordingActiveProcesses[processId];
     }
   };
   Services.obs.addObserver(recordingHandler, 'recording-device-events', false);
   Services.obs.addObserver(recordingHandler, 'recording-device-ipc-events', false);
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     // send additional recording events if content process is being killed
     let processId = aSubject.QueryInterface(Ci.nsIPropertyBag2).get('childID');
     if (gRecordingActiveProcesses.hasOwnProperty(processId)) {
       Services.obs.notifyObservers(aSubject, 'recording-device-ipc-events', 'content-shutdown');
     }
   }, 'ipc:content-shutdown', false);
 })();
 (function volumeStateTracker() {
   Services.obs.addObserver(function(aSubject, aTopic, aData) {
     shell.sendChromeEvent({
       type: 'volume-state-changed',
       active: (aData == 'Shared')
     });
 }, 'volume-state-changed', false);
 })();
 #ifdef MOZ_WIDGET_GONK
 // Devices don't have all the same partition size for /cache where we
 // store the http cache.
 (function setHTTPCacheSize() {
   let path = Services.prefs.getCharPref("browser.cache.disk.parent_directory");
   let volumeService = Cc["@mozilla.org/telephony/volume-service;1"]
                         .getService(Ci.nsIVolumeService);
   let stats = volumeService.createOrGetVolumeByPath(path).getStats();
   // We must set the size in KB, and keep a bit of free space.
   let size = Math.floor(stats.totalBytes / 1024) - 1024;
   Services.prefs.setIntPref("browser.cache.disk.capacity", size);
 }) ()
 #endif
 #ifdef MOZ_WIDGET_GONK
 let SensorsListener = {
   sensorsListenerDevices: ['crespo'],
   device: libcutils.property_get("ro.product.device"),
   deviceNeedsWorkaround: function SensorsListener_deviceNeedsWorkaround() {
     return (this.sensorsListenerDevices.indexOf(this.device) != -1);
   },
   handleEvent: function SensorsListener_handleEvent(evt) {
     switch(evt.type) {
       case 'devicemotion':
         // Listener that does nothing, we need this to have the sensor being
         // able to report correct values, as explained in bug 753245, comment 6
         // and in bug 871916
         break;
       default:
         break;
     }
   },
   observe: function SensorsListener_observe(subject, topic, data) {
     // We remove the listener when the screen is off, otherwise sensor will
     // continue to bother us with data and we won't be able to get the
     // system into suspend state, thus draining battery.
     if (data === 'on') {
       window.addEventListener('devicemotion', this);
     } else {
       window.removeEventListener('devicemotion', this);
     }
   },
   init: function SensorsListener_init() {
     if (this.deviceNeedsWorkaround()) {
       // On boot, enable the listener, screen will be on.
       window.addEventListener('devicemotion', this);
       // Then listen for further screen state changes
       Services.obs.addObserver(this, 'screen-state-changed', false);
     }
   }
 }
 SensorsListener.init();
 #endif
 // Calling this observer will cause a shutdown an a profile reset.
 // Use eg. : Services.obs.notifyObservers(null, 'b2g-reset-profile', null);
 Services.obs.addObserver(function resetProfile(subject, topic, data) {
   Services.obs.removeObserver(resetProfile, topic);
   // Listening for 'profile-before-change2' which is late in the shutdown
   // sequence, but still has xpcom access.
   Services.obs.addObserver(function clearProfile(subject, topic, data) {
     Services.obs.removeObserver(clearProfile, topic);
 #ifdef MOZ_WIDGET_GONK
     let json = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
     json.initWithPath('/system/b2g/webapps/webapps.json');
     let toRemove = json.exists()
       // This is a user build, just rm -r /data/local /data/b2g/mozilla
       ? ['/data/local', '/data/b2g/mozilla']
       // This is an eng build. We clear the profile and a set of files
       // under /data/local.
       : ['/data/b2g/mozilla',
          '/data/local/permissions.sqlite',
          '/data/local/storage',
          '/data/local/OfflineCache'];
     toRemove.forEach(function(dir) {
       try {
         let file = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
         file.initWithPath(dir);
         file.remove(true);
       } catch(e) { dump(e); }
     });
 #else
     // Desktop builds.
     let profile = Services.dirsvc.get('ProfD', Ci.nsIFile);
     // We don't want to remove everything from the profile, since this
     // would prevent us from starting up.
     let whitelist = ['defaults', 'extensions', 'settings.json',
                      'user.js', 'webapps'];
     let enumerator = profile.directoryEntries;
     while (enumerator.hasMoreElements()) {
       let file = enumerator.getNext().QueryInterface(Ci.nsIFile);
       if (whitelist.indexOf(file.leafName) == -1) {
         file.remove(true);
       }
     }
 #endif
   },
   'profile-before-change2', false);
   let appStartup = Cc['@mozilla.org/toolkit/app-startup;1']
                      .getService(Ci.nsIAppStartup);
   appStartup.quit(Ci.nsIAppStartup.eForceQuit);
 }, 'b2g-reset-profile', false);
 /**
   * CID of our implementation of nsIDownloadManagerUI.
   */
 const kTransferCid = Components.ID("{1b4c85df-cbdd-4bb6-b04e-613caece083c}");
 /**
   * Contract ID of the service implementing nsITransfer.
   */
 const kTransferContractId = "@mozilla.org/transfer;1";
 // Override Toolkit's nsITransfer implementation with the one from the
 // JavaScript API for downloads.  This will eventually be removed when
 // nsIDownloadManager will not be available anymore (bug 851471).  The
 // old code in this module will be removed in bug 899110.
 Components.manager.QueryInterface(Ci.nsIComponentRegistrar)
                   .registerFactory(kTransferCid, "",
                                    kTransferContractId, null);