Cast: end2end bug fixes

media/cast/video_receiver/video_receiver.cc

Index: media/cast/video_receiver/video_receiver.cc
diff --git a/media/cast/video_receiver/video_receiver.cc b/media/cast/video_receiver/video_receiver.cc
index 82a2c293823ac5fbe1784f9dfcd0c079129bc0d1..1e6e500e15848a58d1d10455016a09115b71bf8f 100644
--- a/media/cast/video_receiver/video_receiver.cc
+++ b/media/cast/video_receiver/video_receiver.cc
@@ -367,6 +367,7 @@ base::TimeTicks VideoReceiver::GetRenderTime(base::TimeTicks now,
   // Note: the senders clock and our local clock might not be synced.
   base::TimeTicks rtp_timestamp_in_ticks;
 
+  // Compute the time offset_in_ticks based on the incoming_rtp_timestamp_.
   if (time_offset_.InMilliseconds() == 0) {
     if (!rtcp_->RtpTimestampInSenderTime(kVideoFrequency,
                                          incoming_rtp_timestamp_,
@@ -389,6 +390,7 @@ base::TimeTicks VideoReceiver::GetRenderTime(base::TimeTicks now,
   }
   // Reset |time_incoming_packet_updated_| to enable a future measurement.
   time_incoming_packet_updated_ = false;
+  // Compute the actual rtp_timestamp_in_ticks based on the current timestamp.
   if (!rtcp_->RtpTimestampInSenderTime(
            kVideoFrequency, rtp_timestamp, &rtp_timestamp_in_ticks)) {
     // This can fail if we have not received any RTCP packets in a long time.