ResourceScheduler should use renderer notifications instead of MRUCache to track renderers.

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 532 matching lines @@
     'browser/loader/resource_message_delegate.cc',
     'browser/loader/resource_message_delegate.h',
     'browser/loader/resource_message_filter.cc',
     'browser/loader/resource_message_filter.h',
     'browser/loader/resource_request_info_impl.cc',
     'browser/loader/resource_request_info_impl.h',
     'browser/loader/resource_scheduler.cc',
     'browser/loader/resource_scheduler.h',
     'browser/loader/resource_scheduler_filter.cc',
     'browser/loader/resource_scheduler_filter.h',
+    'browser/loader/resource_scheduler_view_observer.cc',
+    'browser/loader/resource_scheduler_view_observer.h',
     'browser/loader/sync_resource_handler.cc',
     'browser/loader/sync_resource_handler.h',
     'browser/loader/throttling_resource_handler.cc',
     'browser/loader/throttling_resource_handler.h',
     'browser/loader/transfer_navigation_resource_throttle.cc',
     'browser/loader/transfer_navigation_resource_throttle.h',
     'browser/mach_broker_mac.cc',
     'browser/mach_broker_mac.h',
     'browser/media_devices_monitor.cc',
     'browser/media/media_internals.cc',
@@ skipping 678 matching lines @@
         ['exclude', '^browser/speech/'],
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }