NOT FOR LANDING Implement WebMediaSession

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',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
     '../device/battery/battery.gyp:device_battery_mojo_bindings',
@@ skipping 992 matching lines @@
       'browser/loader/upload_data_stream_builder.cc',
       'browser/loader/upload_data_stream_builder.h',
       'browser/mach_broker_mac.h',
       'browser/mach_broker_mac.mm',
       'browser/manifest/manifest_manager_host.cc',
       'browser/manifest/manifest_manager_host.h',
       'browser/media/android/browser_demuxer_android.cc',
       'browser/media/android/browser_demuxer_android.h',
       'browser/media/android/browser_media_player_manager.cc',
       'browser/media/android/browser_media_player_manager.h',
+      'browser/media/android/browser_media_session_manager.cc',
+      'browser/media/android/browser_media_session_manager.h',
       'browser/media/android/media_drm_credential_manager.cc',
       'browser/media/android/media_drm_credential_manager.h',
       'browser/media/android/media_resource_getter_impl.cc',
       'browser/media/android/media_resource_getter_impl.h',
       'browser/media/android/media_session.cc',
       'browser/media/android/media_session.h',
       'browser/media/android/media_session_observer.h',
       'browser/media/audio_state_provider.cc',
       'browser/media/audio_state_provider.h',
       'browser/media/audio_stream_monitor.cc',
@@ skipping 1115 matching lines @@
       'sources': [
         'browser/vr/vr_device.cc',
         'browser/vr/vr_device.h',
         'browser/vr/vr_device_manager.cc',
         'browser/vr/vr_device_manager.h',
         'browser/vr/vr_device_provider.h',
       ]
     }],
   ],
 }