Remove SendBeginFramesToChildren plumbing

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': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/leveldb/leveldb.gyp:leveldb_lib',
@@ skipping 1177 matching lines @@
       'browser/profiler_controller_impl.h',
       'browser/profiler_message_filter.cc',
       'browser/profiler_message_filter.h',
       'browser/push_messaging/push_messaging_message_filter.cc',
       'browser/push_messaging/push_messaging_message_filter.h',
       'browser/push_messaging/push_messaging_router.cc',
       'browser/push_messaging/push_messaging_router.h',
       'browser/quota_dispatcher_host.cc',
       'browser/quota_dispatcher_host.h',
       'browser/renderer_data_memoizing_store.h',
-      'browser/renderer_host/begin_frame_observer_proxy.cc',
-      'browser/renderer_host/begin_frame_observer_proxy.h',
       'browser/renderer_host/clipboard_message_filter.cc',
       'browser/renderer_host/clipboard_message_filter.h',
       'browser/renderer_host/clipboard_message_filter_mac.mm',
       'browser/renderer_host/compositor_resize_lock_aura.cc',
       'browser/renderer_host/compositor_resize_lock_aura.h',
       'browser/renderer_host/database_message_filter.cc',
       'browser/renderer_host/database_message_filter.h',
       'browser/renderer_host/delegated_frame_evictor.cc',
       'browser/renderer_host/delegated_frame_evictor.h',
       'browser/renderer_host/dip_util.cc',
@@ skipping 887 matching lines @@
         '<@(android_in_process_browser_sources)',
       ],
       'sources!': [
         'browser/browser_ipc_logging.cc',
         'browser/geolocation/device_data_provider.cc',
         'browser/geolocation/empty_device_data_provider.cc',
         'browser/geolocation/wifi_data_provider_common.cc',
         'browser/media/session/media_session_delegate_default.cc',
         'browser/power_usage_monitor_impl.cc',
         'browser/power_usage_monitor_impl.h',
-        'browser/renderer_host/begin_frame_observer_proxy.cc',
         'browser/renderer_host/native_web_keyboard_event.cc',
       ]
     }],
     ['OS=="mac"', {
       'sources/': [
         ['exclude', '^browser/device_sensors/data_fetcher_shared_memory_default.cc$'],
       ],
       'sources!': [
         'browser/geolocation/empty_wifi_data_provider.cc',
       ],
@@ skipping 104 matching lines @@
     ['enable_webvr==1 and OS=="android"', {
       'sources': [
         'browser/vr/android/cardboard/cardboard_vr_device.cc',
         'browser/vr/android/cardboard/cardboard_vr_device.h',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.cc',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.h',
       ],
     }],
   ],
 }