Implement timing frames.

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc b/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
index debe836d8d70e853a36f8d32b9b59ad99ce9426f..e628bf7a5cd0bf5f512679aa344b9eca3a2add7c 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
@@ -91,6 +91,7 @@ int32_t RTPReceiverVideo::ParseRtpPacket(WebRtcRTPHeader* rtp_header,
   rtp_header->type = parsed_payload.type;
   rtp_header->type.Video.rotation = kVideoRotation_0;
   rtp_header->type.Video.content_type = VideoContentType::UNSPECIFIED;
+  rtp_header->type.Video.video_timing.is_timing_frame = false;
 
   // Retrieve the video rotation information.
   if (rtp_header->header.extension.hasVideoRotation) {
@@ -103,6 +104,12 @@ int32_t RTPReceiverVideo::ParseRtpPacket(WebRtcRTPHeader* rtp_header,
         rtp_header->header.extension.videoContentType;
   }
 
+  if (rtp_header->header.extension.hasVideoTiming) {
+    rtp_header->type.Video.video_timing =
+        rtp_header->header.extension.videoTiming;
+    rtp_header->type.Video.video_timing.is_timing_frame = true;
+  }
+
   rtp_header->type.Video.playout_delay =
       rtp_header->header.extension.playout_delay;