Plumb audio focus support for spitzer clients.

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index 03818aff63b1b120fcb62dfd521a45cd693a4c68..f0e2b29561a0d8ccaba66e9c3b4c366519654b69 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -204,6 +204,9 @@ WebMediaPlayerImpl::WebMediaPlayerImpl(
       params.audio_renderer_sink().get()
           ? params.audio_renderer_sink()
           : new NullAudioSink(media_task_runner_));
+#if defined(OS_ANDROID)
+  audio_source_provider_->enable_audio_focus();
+#endif
 }
 
 WebMediaPlayerImpl::~WebMediaPlayerImpl() {
@@ -211,10 +214,8 @@ WebMediaPlayerImpl::~WebMediaPlayerImpl() {
 
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
-  if (delegate_) {
-    delegate_->RemoveObserver(this);
+  if (delegate_)
     delegate_->PlayerGone(this);
-  }
 
   // Abort any pending IO so stopping the pipeline doesn't get blocked.
   if (data_source_)
@@ -1034,6 +1035,10 @@ void WebMediaPlayerImpl::OnAddTextTrack(
   done_cb.Run(std::move(text_track));
 }
 
+blink::WebMediaPlayer* WebMediaPlayerImpl::GetPlayer() {
+  return this;
+}
+
 void WebMediaPlayerImpl::OnHidden() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
@@ -1112,6 +1117,18 @@ void WebMediaPlayerImpl::OnShown() {
   Resume();
 }
 
+void WebMediaPlayerImpl::OnPlay() {
+  // TODO(dalecurtis): All clients use the same code for OnPlay/OnPause... which
+  // suggests there's some cleanup worth doing.
+  play();
+  client_->playbackStateChanged();
+}
+
+void WebMediaPlayerImpl::OnPause() {
+  pause();
+  client_->playbackStateChanged();
+}
+
 void WebMediaPlayerImpl::Resume() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   CHECK(suspended_);