Moving mediaplayer to the chrome filebrowser. Observable behaviour should not change.

chrome/renderer/resources/renderer_extension_bindings.js

 // Copyright (c) 2011 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.
 
 // This script contains unprivileged javascript APIs related to chrome
 // extensions.  It is loaded by any extension-related context, such as content
 // scripts or toolstrips.
 // See user_script_slave.cc for script that is loaded by content scripts only.
 // TODO(mpcomplete): we also load this in regular web pages, but don't need to.
 
@@ skipping 303 matching lines @@
       "experimental.sidebar",
       "experimental.tts",
       "experimental.webNavigation",
       "experimental.webRequest",
       "fileBrowserHandler",
       "fileBrowserPrivate",
       "fileSystem",
       "history",
       "idle",
       "management",
+      "mediaPlayerPrivate",
       "omnibox",
       "pageAction",
       "pageActions",
       "preferences",
       "proxy",
       "tabs",
       "test",
       "toolstrip",
       "webSocketProxyPrivate",
       "webstorePrivate",
@@ skipping 10 matching lines @@
       "extension.onRequestExternal",
       "extension.setUpdateUrlData",
       "i18n.getAcceptLanguages"
     ];
     for (var i = 0; i < privileged.length; i++) {
       createStub(privileged[i]);
     }
   }
 
 })();