Revert of [scheduler] Teach scheduler about audio state

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 11172c31d3b9c4f0fc6bcffb7a69d687a4238cc9..5f7253580ba5551fa6a3f4140f483487e6cfc9d1 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1259,7 +1259,8 @@ void WebContentsImpl::SetAudioMuted(bool mute) {
   for (auto& observer : observers_)
     observer.DidUpdateAudioMutingState(mute);
 
-  OnAudioStateChanged(!mute && audio_stream_monitor_.IsCurrentlyAudible());
+  // Notification for UI updates in response to the changed muting state.
+  NotifyNavigationStateChanged(INVALIDATE_TYPE_TAB);
 }
 
 bool WebContentsImpl::IsConnectedToBluetoothDevice() const {
@@ -1319,14 +1320,6 @@ void WebContentsImpl::NotifyNavigationStateChanged(
     GetOuterWebContents()->NotifyNavigationStateChanged(changed_flags);
 }
 
-void WebContentsImpl::OnAudioStateChanged(bool is_audio_playing) {
-  SendPageMessage(
-      new PageMsg_AudioStateChanged(MSG_ROUTING_NONE, is_audio_playing));
-
-  // Notification for UI updates in response to the changed muting state.
-  NotifyNavigationStateChanged(INVALIDATE_TYPE_TAB);
-}
-
 base::TimeTicks WebContentsImpl::GetLastActiveTime() const {
   return last_active_time_;
 }