Preliminary change for new rtc rendering algorithm

media/base/video_frame.cc

Index: media/base/video_frame.cc
diff --git a/media/base/video_frame.cc b/media/base/video_frame.cc
index 51269a8b6076736e3b1c03e6fd7e46635901c956..57345426c025d8fb3eec1220d3397dab2fbb6216 100644
--- a/media/base/video_frame.cc
+++ b/media/base/video_frame.cc
@@ -771,7 +771,8 @@ VideoFrame::VideoFrame(VideoPixelFormat format,
       shared_memory_handle_(base::SharedMemory::NULLHandle()),
       shared_memory_offset_(0),
       timestamp_(timestamp),
-      release_sync_point_(0) {
+      release_sync_point_(0),
+      render_time_(base::TimeTicks()) {
   DCHECK(IsValidConfig(format_, storage_type, coded_size_, visible_rect_,
                        natural_size_));
   memset(&mailbox_holders_, 0, sizeof(mailbox_holders_));
@@ -865,4 +866,12 @@ void VideoFrame::AllocateYUV() {
   AddDestructionObserver(base::Bind(&base::AlignedFree, data));
 }
 
+base::TimeTicks VideoFrame::render_time() {
+  return render_time_;
+}
+
+void VideoFrame::set_render_time(base::TimeTicks render_time) {
+  render_time_ = render_time;
+}
+
 }  // namespace media