Cast: Plumb raw event logs to cast extension, install EncodingEventSubscriber on CastSessionDelegat…

chrome/renderer/media/cast_session_delegate.h

Index: chrome/renderer/media/cast_session_delegate.h
diff --git a/chrome/renderer/media/cast_session_delegate.h b/chrome/renderer/media/cast_session_delegate.h
index 1dc6e960f2d53a0e7dec9bdb055cb4dbd21f6601..70c11e8d75ef149c6d9ef90e4460150d14c848fe 100644
--- a/chrome/renderer/media/cast_session_delegate.h
+++ b/chrome/renderer/media/cast_session_delegate.h
@@ -24,6 +24,7 @@ class VideoFrame;
 
 namespace cast {
 class CastEnvironment;
+class EncodingEventSubscriber;
 class FrameInput;
 
 namespace transport {
@@ -40,6 +41,7 @@ class CastSessionDelegate {
  public:
   typedef base::Callback<void(const scoped_refptr<media::cast::FrameInput>&)>
       FrameInputAvailableCallback;
+  typedef base::Callback<void(scoped_ptr<std::string>)> EventLogsCallback;
 
   CastSessionDelegate();
   virtual ~CastSessionDelegate();
@@ -56,6 +58,9 @@ class CastSessionDelegate {
   void StartUDP(const net::IPEndPoint& local_endpoint,
                 const net::IPEndPoint& remote_endpoint);
 
+  // Returns raw event logs in serialized format since last call.
+  void GetEventLogsAndReset(const EventLogsCallback& callback);
+
  protected:
   // Callback with the result of the initialization.
   // If this callback is called with STATUS_INITIALIZED it will report back
@@ -92,6 +97,9 @@ class CastSessionDelegate {
   FrameInputAvailableCallback audio_frame_input_available_callback_;
   FrameInputAvailableCallback video_frame_input_available_callback_;
 
+  scoped_ptr<media::cast::EncodingEventSubscriber> audio_event_subscriber_;
+  scoped_ptr<media::cast::EncodingEventSubscriber> video_event_subscriber_;
+
   net::IPEndPoint local_endpoint_;
   net::IPEndPoint remote_endpoint_;
   bool transport_configured_;