diff -r 000000000000 -r 6474c204b198 webapprt/WebRTCHandler.jsm
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webapprt/WebRTCHandler.jsm	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,103 @@
+/* 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/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = [];
+
+let Cc = Components.classes;
+let Ci = Components.interfaces;
+let Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+function handleRequest(aSubject, aTopic, aData) {
+  let { windowID, callID } = aSubject;
+  let constraints = aSubject.getConstraints();
+  let contentWindow = Services.wm.getOuterWindowWithId(windowID);
+
+  contentWindow.navigator.mozGetUserMediaDevices(
+    constraints,
+    function (devices) {
+      prompt(contentWindow, callID, constraints.audio,
+             constraints.video || constraints.picture,
+             devices);
+    },
+    function (error) {
+      denyRequest(callID, error);
+    });
+}
+
+function prompt(aWindow, aCallID, aAudioRequested, aVideoRequested, aDevices) {
+  let audioDevices = [];
+  let videoDevices = [];
+  for (let device of aDevices) {
+    device = device.QueryInterface(Ci.nsIMediaDevice);
+    switch (device.type) {
+      case "audio":
+        if (aAudioRequested) {
+          audioDevices.push(device);
+        }
+        break;
+
+      case "video":
+        if (aVideoRequested) {
+          videoDevices.push(device);
+        }
+        break;
+    }
+  }
+
+  if (audioDevices.length == 0 && videoDevices.length == 0) {
+    denyRequest(aCallID);
+    return;
+  }
+
+  let params = {
+                 videoDevices: videoDevices,
+                 audioDevices: audioDevices,
+                 out: null
+               };
+  aWindow.openDialog("chrome://webapprt/content/getUserMediaDialog.xul", "",
+                     "chrome, dialog, modal", params).focus();
+
+  if (!params.out) {
+    denyRequest(aCallID);
+    return;
+  }
+
+  let allowedDevices = Cc["@mozilla.org/supports-array;1"].
+                       createInstance(Ci.nsISupportsArray);
+  let videoIndex = params.out.video;
+  let audioIndex = params.out.audio;
+
+  if (videoIndex != -1) {
+    allowedDevices.AppendElement(videoDevices[videoIndex]);
+  }
+
+  if (audioIndex != -1) {
+    allowedDevices.AppendElement(audioDevices[audioIndex]);
+  }
+
+  if (allowedDevices.Count()) {
+    Services.obs.notifyObservers(allowedDevices, "getUserMedia:response:allow",
+                                 aCallID);
+  } else {
+    denyRequest(aCallID);
+  }
+}
+
+function denyRequest(aCallID, aError) {
+  let msg = null;
+  if (aError) {
+    msg = Cc["@mozilla.org/supports-string;1"].
+          createInstance(Ci.nsISupportsString);
+    msg.data = aError;
+  }
+
+  Services.obs.notifyObservers(msg, "getUserMedia:response:deny", aCallID);
+}
+
+Services.obs.addObserver(handleRequest, "getUserMedia:request", false);