Plumb audio focus support for spitzer clients.

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index bf8594db964b8d3a8306e248729f577b416710df..540682c4523ad6c97cc16f3df8856b4aebfb8e7f 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -225,6 +225,9 @@ WebMediaPlayerAndroid::WebMediaPlayerAndroid(
   DCHECK(main_thread_checker_.CalledOnValidThread());
   stream_texture_factory_->AddObserver(this);
 
+  if (delegate)
+    delegate->AddObserver(this);
+
   player_id_ = player_manager_->RegisterMediaPlayer(this);
 
 #if defined(VIDEO_HOLE)
@@ -1834,6 +1837,24 @@ void WebMediaPlayerAndroid::OnWaitingForDecryptionKey() {
   encrypted_client_->didResumePlaybackBlockedForKey();
 }
 
+blink::WebMediaPlayer* WebMediaPlayerAndroid::GetPlayer() {
+  return this;
+}
+
+void WebMediaPlayerAndroid::OnHidden() {}
+
+void WebMediaPlayerAndroid::OnShown() {}
+
+void WebMediaPlayerAndroid::OnPlay() {
+  play();
+  client_->playbackStateChanged();
+}
+
+void WebMediaPlayerAndroid::OnPause() {
+  pause();
+  client_->playbackStateChanged();
+}
+
 void WebMediaPlayerAndroid::OnCdmContextReady(media::CdmContext* cdm_context) {
   DCHECK(!cdm_context_);