diff -r 000000000000 -r 6474c204b198 browser/metro/base/content/helperui/IndexedDB.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/metro/base/content/helperui/IndexedDB.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,89 @@
+/* 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/. */
+
+/**
+ * Helper class for IndexedDB, parent part. Listens to
+ * messages from the child and shows prompts for them.
+ */
+let IndexedDB = {
+  _permissionsPrompt: "indexedDB-permissions-prompt",
+  _permissionsResponse: "indexedDB-permissions-response",
+
+  _quotaPrompt: "indexedDB-quota-prompt",
+  _quotaResponse: "indexedDB-quota-response",
+  _quotaCancel: "indexedDB-quota-cancel",
+
+  _notificationIcon: "indexedDB-notification-icon",
+
+  receiveMessage: function(aMessage) {
+    switch (aMessage.name) {
+      case "IndexedDB:Prompt":
+        this.showPrompt(aMessage);
+    }
+  },
+
+  showPrompt: function(aMessage) {
+    let browser = aMessage.target;
+    let payload = aMessage.json;
+    let host = payload.host;
+    let topic = payload.topic;
+    let type;
+
+    if (topic == this._permissionsPrompt) {
+      type = "indexedDB";
+      payload.responseTopic = this._permissionsResponse;
+    } else if (topic == this._quotaPrompt) {
+      type = "indexedDBQuota";
+      payload.responseTopic = this._quotaResponse;
+    } else if (topic == this._quotaCancel) {
+      payload.permission = Ci.nsIPermissionManager.UNKNOWN_ACTION;
+      browser.messageManager.sendAsyncMessage("IndexedDB:Response", payload);
+      // XXX Need to actually save this?
+      return;
+    }
+
+    let prompt = Cc["@mozilla.org/content-permission/prompt;1"].createInstance(Ci.nsIContentPermissionPrompt);
+    let types = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
+    let promptType = {
+      type: type,
+      access: "unused",
+      QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPermissionType])
+    };
+    types.appendElement(promptType, false);
+
+    // If the user waits a long time before responding, we default to UNKNOWN_ACTION.
+    let timeoutId = setTimeout(function() {
+      payload.permission = Ci.nsIPermissionManager.UNKNOWN_ACTION;
+      browser.messageManager.sendAsyncMessage("IndexedDB:Response", payload);
+      timeoutId = null;
+    }, 30000);
+ 
+    function checkTimeout() {
+      if (timeoutId === null) return true;
+      clearTimeout(timeoutId);
+      timeoutId = null;
+      return false;
+    }
+
+    prompt.prompt({
+      types: types,
+      uri: Services.io.newURI(payload.location, null, null),
+      window: null,
+      element: aMessage.target,
+
+      cancel: function() {
+        if (checkTimeout()) return;
+        payload.permission = Ci.nsIPermissionManager.DENY_ACTION;
+        browser.messageManager.sendAsyncMessage("IndexedDB:Response", payload);
+      },
+
+      allow: function() {
+        if (checkTimeout()) return;
+        payload.permission = Ci.nsIPermissionManager.ALLOW_ACTION;
+        browser.messageManager.sendAsyncMessage("IndexedDB:Response", payload);
+      },
+    });
+  },
+};
+