[Cast] Aggressively send sender reports until first receiver report is received.

media/cast/video_sender/video_sender.h

Index: media/cast/video_sender/video_sender.h
diff --git a/media/cast/video_sender/video_sender.h b/media/cast/video_sender/video_sender.h
index f21b11db57698501a02a5a9bb770a8bfbe7ab7a2..59792f7693088e94f74de3072de5810d4354efe8 100644
--- a/media/cast/video_sender/video_sender.h
+++ b/media/cast/video_sender/video_sender.h
@@ -23,7 +23,6 @@ namespace media {
 class VideoFrame;
 
 namespace cast {
-class LocalRtcpVideoSenderFeedback;
 class LocalVideoEncoderCallback;
 class VideoEncoder;
 
@@ -37,7 +36,8 @@ class CastTransportSender;
 // RTCP packets.
 // Additionally it posts a bunch of delayed tasks to the main thread for various
 // timeouts.
-class VideoSender : public base::NonThreadSafe,
+class VideoSender : public RtcpSenderFeedback,
+                    public base::NonThreadSafe,
                     public base::SupportsWeakPtr<VideoSender> {
  public:
   VideoSender(scoped_refptr<CastEnvironment> cast_environment,
@@ -61,7 +61,8 @@ class VideoSender : public base::NonThreadSafe,
 
  protected:
   // Protected for testability.
-  void OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback);
+  virtual void OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback)
+      OVERRIDE;
 
  private:
   friend class LocalRtcpVideoSenderFeedback;
@@ -69,7 +70,7 @@ class VideoSender : public base::NonThreadSafe,
   // Schedule when we should send the next RTPC report,
   // via a PostDelayedTask to the main cast thread.
   void ScheduleNextRtcpReport();
-  void SendRtcpReport();
+  void SendRtcpReport(bool schedule_future_reports);
 
   // Schedule when we should check that we have received an acknowledgment, or a
   // loss report from our remote peer. If we have not heard back from our remote
@@ -104,9 +105,9 @@ class VideoSender : public base::NonThreadSafe,
   transport::CastTransportSender* const transport_sender_;
 
   RtpTimestampHelper rtp_timestamp_helper_;
-  scoped_ptr<LocalRtcpVideoSenderFeedback> rtcp_feedback_;
   scoped_ptr<VideoEncoder> video_encoder_;
   scoped_ptr<Rtcp> rtcp_;
+  int num_aggressive_rtcp_reports_sent_;
   uint8 max_unacked_frames_;
   int last_acked_frame_id_;
   int last_sent_frame_id_;