Implement adaptive target delay extension

media/cast/receiver/frame_receiver.h

Index: media/cast/receiver/frame_receiver.h
diff --git a/media/cast/receiver/frame_receiver.h b/media/cast/receiver/frame_receiver.h
index 2ddeeb980cd2e1001608a2ab9053a73a0f1f8fbb..695c8d0a9be9189befa77d4dd1eca4b11cd811d6 100644
--- a/media/cast/receiver/frame_receiver.h
+++ b/media/cast/receiver/frame_receiver.h
@@ -92,7 +92,7 @@ class FrameReceiver : public RtpPayloadFeedback,
   // Computes the playout time for a frame with the given |rtp_timestamp|.
   // Because lip-sync info is refreshed regularly, calling this method with the
   // same argument may return different results.
-  base::TimeTicks GetPlayoutTime(uint32 rtp_timestamp) const;
+  base::TimeTicks GetPlayoutTime(const EncodedFrame& frame) const;
 
   // Schedule timing for the next cast message.
   void ScheduleNextCastMessage();
@@ -130,7 +130,7 @@ class FrameReceiver : public RtpPayloadFeedback,
   // transmit/retransmit, receive, decode, and render; given its run-time
   // environment (sender/receiver hardware performance, network conditions,
   // etc.).
-  const base::TimeDelta target_playout_delay_;
+  base::TimeDelta target_playout_delay_;
 
   // Hack: This is used in logic that determines whether to skip frames.
   // TODO(miu): Revisit this.  Logic needs to also account for expected decode