Remove obsolete Cast extension IDs from various whitelists and files.

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 chrome/common/extensions/api/_features.md to understand this file, as
 // well as feature.h, simple_feature.h, and 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 254 matching lines @@
       "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2",  // http://crbug.com/312900.
       "D57DE394F36DC1C3220E7604C575D29C51A6C495",  // http://crbug.com/319444.
       "3F65507A3B39259B38C8173C6FFA3D12DF64CCE9",  // http://crbug.com/371562.
       "D7986543275120831B39EF28D1327552FC343960",  // http://crbug.com/378067
       "A291B26E088FA6BA53FFD72F0916F06EBA7C585A",  // http://crbug.com/378067
       "62CCAAD339E6451BBF97C4BBDF758E934A05AD0B",  // Hotword triggering
       "07BD6A765FFC289FF755D7CAB2893A40EC337FEC",  // http://crbug.com/456214
       "896B85CC7E913E11C34892C1425A093C0701D386",  // http://crbug.com/456214
       "11A01C82EF355E674E4F9728A801F5C3CB40D83F",  // http://crbug.com/456214
       "F410C88469990EE7947450311D24B8AF2ADB2595",  // http://crbug.com/456214
-      "226CF815E39A363090A1E547D53063472B8279FA",  // http://crbug.com/574889
-      "C17CD9E6868D7B9C67926E0EC612EA25C768418F",  // http://crbug.com/504940
-      "A45DABDB47A31CC812E5490AB748C7D05E2D32E9",  // http://crbug.com/504940
-      "BFEE2E3B80BE21A645E63E9346DFC383E7CB3BDA",  // http://crbug.com/504940
-      "63ED55E43214C211F82122ED56407FF1A807F2A3",  // http://crbug.com/504940
+      "63ED55E43214C211F82122ED56407FF1A807F2A3",  // Media Router Dev
+      "226CF815E39A363090A1E547D53063472B8279FA",  // Media Router Stable
       // TODO (ntang) Remove the following 2 hashes by 12/31/2017.
       "B620CF4203315F9F2E046EDED22C7571A935958D",  // http://crbug.com/510270
       "B206D8716769728278D2D300349C6CB7D7DE2EF9",  // http://crbug.com/510270
       "2B6C6A4A5940017146F3E58B7F90116206E84685",  // http://crbug.com/642141
       "B6C2EFAB3EC3BF6EF03701408B6B09A67B2D0069",  // http://crbug.com/642141
       "96FF2FFA5C9173C76D47184B3E86D267B37781DE",  // http://crbug.com/642141
       "0136FCB13DB29FD5CD442F56E59E53B61F1DF96F"   // http://crbug.com/642141
     ]
   },
   "mimeHandlerPrivate": {
     "dependencies": ["manifest:mime_types_handler"],
     "contexts": ["blessed_extension"]
   },
   "mojoPrivate": {
     "contexts": ["blessed_extension"],
     "channel": "stable",
     "extension_types": ["platform_app", "extension"],
     "whitelist": [
-      "226CF815E39A363090A1E547D53063472B8279FA",  // http://crbug.com/574889
-      "C17CD9E6868D7B9C67926E0EC612EA25C768418F",  // http://crbug.com/448569
-      "A45DABDB47A31CC812E5490AB748C7D05E2D32E9",
-      "BFEE2E3B80BE21A645E63E9346DFC383E7CB3BDA",
-      "63ED55E43214C211F82122ED56407FF1A807F2A3"
+      "63ED55E43214C211F82122ED56407FF1A807F2A3",   // Media Router Dev
+      "226CF815E39A363090A1E547D53063472B8279FA"    // Media Router Stable
     ]
   },
   "networking.config": {
     "dependencies": ["permission:networking.config"],
     "contexts": ["blessed_extension"]
   },
   "networking.onc": {
     "dependencies": ["permission:networking.onc"],
     "contexts": ["blessed_extension"],
     "source": "networkingPrivate"
@@ skipping 222 matching lines @@
   }, {
     "channel": "stable",
     "contexts": ["webui"],
     "matches": [
       "chrome://chrome-signin/*",
       "chrome://media-router/*",
       "chrome://oobe/*"
     ]
   }]
 }