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

content/browser/resources/media/new/player_manager.js

Index: content/browser/resources/media/new/player_manager.js
diff --git a/content/browser/resources/media/new/player_manager.js b/content/browser/resources/media/new/player_manager.js
index 3de93357f98ce5a7cfdc12e57e7fd47d4fd9b1f6..a6d9ef32b441af46fedd562c0dce55b5406d5132 100644
--- a/content/browser/resources/media/new/player_manager.js
+++ b/content/browser/resources/media/new/player_manager.js
@@ -51,6 +51,10 @@ var PlayerManager = (function() {
       }
     },
 
+    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.