Revert of Revert of Propagate audible state from player to the containing tab"

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/vibration/vibration.gyp:device_vibration',
     '../device/vibration/vibration.gyp:device_vibration_mojo_bindings',
@@ skipping 337 matching lines @@
       'browser/android/in_process/synchronous_compositor_output_surface.cc',
       'browser/android/in_process/synchronous_compositor_output_surface.h',
       'browser/android/in_process/synchronous_compositor_registry.cc',
       'browser/android/in_process/synchronous_compositor_registry.h',
       'browser/android/in_process/synchronous_input_event_filter.cc',
       'browser/android/in_process/synchronous_input_event_filter.h',
       'browser/android/interstitial_page_delegate_android.cc',
       'browser/android/interstitial_page_delegate_android.h',
       'browser/android/load_url_params.cc',
       'browser/android/load_url_params.h',
+      'browser/android/media_players_observer.cc',
+      'browser/android/media_players_observer.h',
       'browser/android/overscroll_controller_android.cc',
       'browser/android/overscroll_controller_android.h',
       'browser/android/overscroll_glow.cc',
       'browser/android/overscroll_glow.h',
       'browser/android/overscroll_refresh.cc',
       'browser/android/overscroll_refresh.h',
       'browser/android/popup_touch_handle_drawable.cc',
       'browser/android/popup_touch_handle_drawable.h',
       'browser/android/tracing_controller_android.cc',
       'browser/android/tracing_controller_android.h',
@@ skipping 553 matching lines @@
       '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/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/audio_state_provider.cc',
+      'browser/media/audio_state_provider.h',
       'browser/media/audio_stream_monitor.cc',
       'browser/media/audio_stream_monitor.h',
       'browser/media/capture/audio_mirroring_manager.cc',
       'browser/media/capture/audio_mirroring_manager.h',
       'browser/media/capture/content_video_capture_device_core.cc',
       'browser/media/capture/content_video_capture_device_core.h',
       'browser/media/capture/video_capture_oracle.cc',
       'browser/media/capture/video_capture_oracle.h',
       'browser/media/capture/web_contents_audio_input_stream.cc',
       'browser/media/capture/web_contents_audio_input_stream.h',
@@ skipping 1031 matching lines @@
         'browser/media/media_web_contents_observer.h',
       ],
     }],
     ['OS == "linux" and use_openssl==1', {
       'dependencies': [
         '../third_party/boringssl/boringssl.gyp:boringssl',
       ],
     }],
   ],
 }