Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

gaia/apps/system/js/system_window.js

@@ -0,0 +1,49 @@
+/* global AudioChannelController */
+/* global BaseModule */
+'use strict';
+
+(function() {
+  /**
+   * SystemWindow is a placeholder for the system app's mozbrowser iframe
+   * but with no actual UI.
+   * We will use mozSystemWindowChromeEvent/mozContentEvent to communicate
+   * with shell.js to use the actual mozbrowser iframe of the system app.
+   */
+  var SystemWindow = function() {};
+
+  SystemWindow.STATES = [
+    'getAudioChannels'
+  ];
+
+  BaseModule.create(SystemWindow, {
+    name: 'SystemWindow',
+    EVENT_PREFIX: 'systemwindow',
+    DEBUG: false,
+    // The fake app window ID of System app.
+    instanceID: null,
+    // The audio channels belong to System app.
+    audioChannels: null,
+
+    /**
+     * Initial the module.
+     */
+    _start: function() {
+      this.instanceID = 'systemAppID';
+      this.audioChannels = new Map();
+      var audioChannelManager = navigator.mozAudioChannelManager;
+      // There is no mozAudioChannelManager in b2g desktop client.
+      if (audioChannelManager && audioChannelManager.allowedAudioChannels) {
+        audioChannelManager.allowedAudioChannels.forEach((audioChannel) => {
+          this.audioChannels.set(
+            audioChannel.name, new AudioChannelController(this, audioChannel)
+          );
+        });
+        this.publish('audiochannelsregistered');
+      }
+    },
+
+    getAudioChannels: function() {
+      return this.audioChannels;
+    }
+  });
+}());