Enable audio/video tag in content_shell

content/browser/renderer_host/media/audio_renderer_host.cc

Index: content/browser/renderer_host/media/audio_renderer_host.cc
diff --git a/content/browser/renderer_host/media/audio_renderer_host.cc b/content/browser/renderer_host/media/audio_renderer_host.cc
index c77c84bab3a56c96ae1fd6413802a5413b23caf4..d2252671d30c983064fb40fe29fa707a6c459ffa 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.cc
+++ b/content/browser/renderer_host/media/audio_renderer_host.cc
@@ -291,7 +291,7 @@ void AudioRendererHost::OnCreateStream(
   // to the map.
   entry->stream_id = stream_id;
   audio_entries_.insert(std::make_pair(stream_id, entry.release()));
-  media_observer()->OnSetAudioStreamStatus(this, stream_id, "created");
+  OnSetAudioStreamStatus(stream_id, "created");
 }
 
 void AudioRendererHost::OnPlayStream(int stream_id) {
@@ -304,7 +304,7 @@ void AudioRendererHost::OnPlayStream(int stream_id) {
   }
 
   entry->controller->Play();
-  media_observer()->OnSetAudioStreamPlaying(this, stream_id, true);
+  OnSetAudioStreamPlaying(stream_id, true);
 }
 
 void AudioRendererHost::OnPauseStream(int stream_id) {
@@ -317,7 +317,7 @@ void AudioRendererHost::OnPauseStream(int stream_id) {
   }
 
   entry->controller->Pause();
-  media_observer()->OnSetAudioStreamPlaying(this, stream_id, false);
+  OnSetAudioStreamPlaying(stream_id, false);
 }
 
 void AudioRendererHost::OnFlushStream(int stream_id) {
@@ -330,13 +330,13 @@ void AudioRendererHost::OnFlushStream(int stream_id) {
   }
 
   entry->controller->Flush();
-  media_observer()->OnSetAudioStreamStatus(this, stream_id, "flushed");
+  OnSetAudioStreamStatus(stream_id, "flushed");
 }
 
 void AudioRendererHost::OnCloseStream(int stream_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
-  media_observer()->OnSetAudioStreamStatus(this, stream_id, "closed");
+  OnSetAudioStreamStatus(stream_id, "closed");
 
   AudioEntry* entry = LookupById(stream_id);
 
@@ -357,7 +357,7 @@ void AudioRendererHost::OnSetVolume(int stream_id, double volume) {
   if (volume < 0 || volume > 1.0)
     return;
   entry->controller->SetVolume(volume);
-  media_observer()->OnSetAudioStreamVolume(this, stream_id, volume);
+  OnSetAudioStreamVolume(stream_id, volume);
 }
 
 void AudioRendererHost::OnGetVolume(int stream_id) {
@@ -429,7 +429,7 @@ void AudioRendererHost::DeleteEntry(AudioEntry* entry) {
   audio_entries_.erase(entry->stream_id);
 
   // Notify the media observer.
-  media_observer()->OnDeleteAudioStream(this, entry->stream_id);
+  OnDeleteAudioStream(entry->stream_id);
 }
 
 void AudioRendererHost::DeleteEntryOnError(AudioEntry* entry) {
@@ -439,7 +439,7 @@ void AudioRendererHost::DeleteEntryOnError(AudioEntry* entry) {
   // |entry| is destroyed in DeleteEntry().
   SendErrorMessage(entry->stream_id);
 
-  media_observer()->OnSetAudioStreamStatus(this, entry->stream_id, "error");
+  OnSetAudioStreamStatus(entry->stream_id, "error");
   CloseAndDeleteStream(entry);
 }
 
@@ -466,6 +466,31 @@ AudioRendererHost::AudioEntry* AudioRendererHost::LookupByController(
   return NULL;
 }
 
+void AudioRendererHost::OnSetAudioStreamPlaying(int stream_id, bool playing) {
+  if (!media_observer())
+    return;
+  media_observer()->OnSetAudioStreamPlaying(this, stream_id, playing);
+}
+
+void AudioRendererHost::OnSetAudioStreamStatus(int stream_id,
+                                               const std::string& status) {
+  if (!media_observer())
+    return;
+  media_observer()->OnSetAudioStreamStatus(this, stream_id, status);
+}
+
+void AudioRendererHost::OnSetAudioStreamVolume(int stream_id, double volume) {
+  if (!media_observer())
+    return;
+  media_observer()->OnSetAudioStreamVolume(this, stream_id, volume);
+}
+
+void AudioRendererHost::OnDeleteAudioStream(int stream_id) {
+  if (!media_observer())
+    return;
+  media_observer()->OnDeleteAudioStream(this, stream_id);
+}
+
 MediaObserver* AudioRendererHost::media_observer() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   if (!media_observer_)