Pass a TimeTicks along video capture pipeline to represent capture time

content/renderer/media/rtc_video_renderer.cc

Index: content/renderer/media/rtc_video_renderer.cc
diff --git a/content/renderer/media/rtc_video_renderer.cc b/content/renderer/media/rtc_video_renderer.cc
index ba380b9c84cf796e50d7d16598c12db580aa2252..5e65f9ac60bbc0143fa74316b5ca31959885b92a 100644
--- a/content/renderer/media/rtc_video_renderer.cc
+++ b/content/renderer/media/rtc_video_renderer.cc
@@ -89,7 +89,8 @@ void RTCVideoRenderer::OnEnabledChanged(bool enabled) {
 
 void RTCVideoRenderer::OnVideoFrame(
     const scoped_refptr<media::VideoFrame>& frame,
-    const media::VideoCaptureFormat& format) {
+    const media::VideoCaptureFormat& format,
+    const base::TimeTicks& start_ticks) {
   DCHECK(message_loop_proxy_->BelongsToCurrentThread());
   if (state_ != STARTED) {
     return;
@@ -114,7 +115,7 @@ void RTCVideoRenderer::RenderSignalingFrame() {
   // originates from a video camera.
   scoped_refptr<media::VideoFrame> video_frame =
       media::VideoFrame::CreateBlackFrame(frame_size_);
-  OnVideoFrame(video_frame, media::VideoCaptureFormat());
+  OnVideoFrame(video_frame, media::VideoCaptureFormat(), base::TimeTicks());
 }
 
 }  // namespace content