[Media Router] Replace old MR extension ID with "new" extension ID.

extensions/common/api/_api_features.json

 // Copyright 2014 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 features file defines extension APIs implemented under src/extensions.
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 //
 // Note that specifying "web_page", "blessed_web_page", or "all" as a context
 // type will require manually updating chrome/renderer/resources/dispatcher.cc.
@@ skipping 229 matching lines @@
   },
   "mimeHandlerPrivate": {
     "dependencies": ["manifest:mime_types_handler"],
     "contexts": ["blessed_extension"]
   },
   "mojoPrivate": {
     "contexts": ["blessed_extension"],
     "channel": "stable",
     "extension_types": ["platform_app", "extension"],
     "whitelist": [
-      "EF2AB692559EA97C3BBDEA018A8C45F92457BD4E",  // http://crbug.com/448569
-      "C17CD9E6868D7B9C67926E0EC612EA25C768418F",
+      "226CF815E39A363090A1E547D53063472B8279FA",  // http://crbug.com/574889
+      "C17CD9E6868D7B9C67926E0EC612EA25C768418F",  // http://crbug.com/448569
       "A45DABDB47A31CC812E5490AB748C7D05E2D32E9",
       "BFEE2E3B80BE21A645E63E9346DFC383E7CB3BDA",
       "63ED55E43214C211F82122ED56407FF1A807F2A3"
     ]
   },
   "networking.config": {
     "dependencies": ["permission:networking.config"],
     "contexts": ["blessed_extension"]
   },
   "networkingPrivate": [{
@@ skipping 204 matching lines @@
   }, {
     "channel": "stable",
     "contexts": ["webui"],
     "matches": [
       "chrome://chrome-signin/*",
       "chrome://media-router/*",
       "chrome://oobe/*"
     ]
   }]
 }