Remove obsolete Cast extension IDs from various whitelists and files.

extensions/common/api/_behavior_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 switches used to control Extension behaviour,
 // typically whitelist configuration.
 // See chrome/common/extensions/api/_features.md to understand this file, as
 // well as feature.h, simple_feature.h, and feature_provider.h.
 
 {
   "whitelisted_for_incognito": {
     "channel": "stable",
     "extension_types": "all",
     // This is "external_component" for legacy reasons; it should be
     // unnecessary given there's a whitelist.
     "location": "external_component",
     "whitelist": [
       "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2",  // http://crbug.com/312900
       "D57DE394F36DC1C3220E7604C575D29C51A6C495",  // http://crbug.com/319444
       "3F65507A3B39259B38C8173C6FFA3D12DF64CCE9"   // http://crbug.com/371562
     ]
   },
   "do_not_sync": {
     "channel": "stable",
     "component_extensions_auto_granted": false,
     "extension_types": "all",
     "whitelist": [
-      "226CF815E39A363090A1E547D53063472B8279FA",  // http://crbug.com/574889
-      "C17CD9E6868D7B9C67926E0EC612EA25C768418F",  // http://crbug.com/505879
-      "A45DABDB47A31CC812E5490AB748C7D05E2D32E9",  // http://crbug.com/505879
-      "BFEE2E3B80BE21A645E63E9346DFC383E7CB3BDA",  // http://crbug.com/505879
-      "16CA7A47AAE4BE49B1E75A6B960C3875E945B264",  // http://crbug.com/505879
-      "F155646B5D1CA545F7E1E4E20D573DFDD44C2540",  // http://crbug.com/505879
-      "B11A93E7E5B541F8010245EBDE2C74647D6C14B9",  // http://crbug.com/505879
-      "FA01E0B81978950F2BC5A50512FD769725F57510"   // http://crbug.com/505879
+      "226CF815E39A363090A1E547D53063472B8279FA"   // Media Router Stable
     ]
   },
   "zoom_without_bubble": {
     "channel": "stable",
     "extension_types": "all",
     "whitelist": [
       "CBCC42ABED43A4B58FE3810E62AFFA010EB0349F"   // https://crbug.com/538252
     ]
   },
   "allow_usb_devices_permission_interface_class": {
@@ skipping 38 matching lines @@
       "2F47B526FA71F44816618C41EC55E5EE9543FDCC",  // Braille Keyboard
       "86672C8D7A04E24EFB244BF96FE518C4C4809F73",  // Speech synthesis
       "1CF709D51B2B96CF79D00447300BD3BFBE401D21",  // Mobile activation
       "D519188F86D9ACCEE0412007B227D9936EB9676B",  // Gaia auth extension
       "40FF1103292F40C34066E023B8BE8CAE18306EAE",  // Chromeos help
       "3C654B3B6682CA194E75AD044CEDE927675DDEE8",  // Easy unlock
       "2FCBCE08B34CCA1728A85F1EFBD9A34DD2558B2E"   // ChromeVox
     ]
   }]
 }