Introduce new interface for MediaInternals updates.

content/browser/resources/media/main.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * A global object that gets used by the C++ interface.
  */
 var media = (function() {
   'use strict';
 
@@ skipping 22 matching lines @@
   };
 
   /**
    * Users of |media| must call initialize prior to calling other methods.
    */
   media.initialize = function(theManager) {
     manager = theManager;
   };
 
   media.onReceiveEverything = function(everything) {
-    for (var key in everything.audio_streams) {
-      media.updateAudioStream(everything.audio_streams[key]);
+    for (var component in everything) {
+      media.updateAudioComponent(everything[component]);
     }
   };
 
   media.onReceiveConstants = function(constants) {
     for (var key in constants.eventTypes) {
       var value = constants.eventTypes[key];
       eventTypes[value] = key;
     }
 
     for (var key in constants.eventPhases) {
@@ skipping 61 matching lines @@
   };
 
   media.onRendererTerminated = function(renderId) {
     util.object.forEach(manager.players_, function(playerInfo, id) {
       if (playerInfo.properties['render_id'] == renderId) {
         manager.removePlayer(id);
       }
     });
   };
 
-  // For whatever reason, addAudioStream is also called on
-  // the removal of audio streams.
-  media.addAudioStream = function(event) {
-    switch (event.status) {
-      case 'created':
-        manager.addAudioStream(event.id);
-        manager.updateAudioStream(event.id, { 'playing': event.playing });
+  media.updateAudioComponent = function(component) {
+    var uniqueComponentId = component.owner_id + ':' + component.component_id;
+    switch (component.status) {
+      case 'closed':
+        manager.removeAudioComponent(
+            component.component_type, uniqueComponentId);
         break;
-      case 'closed':
-        manager.removeAudioStream(event.id);
+      default:
+        manager.updateAudioComponent(
+            component.component_type, uniqueComponentId, component);
         break;
     }
   };
 
-  media.updateAudioStream = function(stream) {
-    manager.addAudioStream(stream.id);
-    manager.updateAudioStream(stream.id, stream);
-  };
-
-  media.onItemDeleted = function() {
-    // This only gets called when an audio stream is removed, which
-    // for whatever reason is also handled by addAudioStream...
-    // Because it is already handled, we can safely ignore it.
-  };
-
   media.onPlayerOpen = function(id, timestamp) {
     manager.addPlayer(id, timestamp);
   };
 
   media.onMediaEvent = function(event) {
     var source = event.renderer + ':' + event.player;
 
     // Although this gets called on every event, there is nothing we can do
     // because there is no onOpen event.
     media.onPlayerOpen(source);
@@ skipping 25 matching lines @@
           source, event.ticksMillis, 'EVENT', event.type);
     }
   };
 
   // |chrome| is not defined during tests.
   if (window.chrome && window.chrome.send) {
     chrome.send('getEverything');
   }
   return media;
 }());