Added the next series of files that go into media-internals.

content/browser/resources/media/new/player_manager.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.
 
 /**
  * @fileoverview Keeps track of all the existing
  * PlayerProperty objects and is the entry-point for messages from the backend.
  */
 var PlayerManager = (function() {
   'use strict';
@@ skipping 33 matching lines @@
       // remove it from the UI
       if (this.shouldRemovePlayer_()) {
         delete this.players_[id];
         this.renderman_.redrawList();
       } else if (this.players_[id]) {
         // Set a property on it to be removed at a later time
         this.players_[id].toRemove = true;
       }
     },
 
+    removeAllForDebug: function() {

[scherkus (not reviewing), 2013/07/29 20:35:54]

s/ForDebug/ForTest/

also ... remove all of what? your other functions names mention players -- I'd
add it here as well (i.e., removeAllPlayersForTest)


alternatively, since reusing objects between tests is frowned upon (leads to
flaky / broken / hard to maintain tests) you may want to consider adding hooks
to manually recreate the PlayerManager instance

[Ty Overby, 2013/07/29 21:53:31]

I like the idea of modifying the media singleton to make a new PlayerManager.

+      this.players_ = {};
+    },
+
     /**
      * Selects a player and displays it on the UI.
      * This method is called from the UI.
      * @param id The ID of the player to display.
      */
     selectPlayer: function(id) {
       if (!this.players_[id]) {
         throw new Error('[selectPlayer] Id ' + id + ' does not exist.');
       }
 
@@ skipping 38 matching lines @@
       if (key === 'name' || key === 'url') {
         this.renderman_.redrawList();
       }
 
       this.renderman_.update();
     }
   };
 
   return PlayerManager;
 }());