Pass a TimeTicks along video capture pipeline to represent capture time

content/renderer/media/webrtc/webrtc_video_track_adapter.cc

Index: content/renderer/media/webrtc/webrtc_video_track_adapter.cc
diff --git a/content/renderer/media/webrtc/webrtc_video_track_adapter.cc b/content/renderer/media/webrtc/webrtc_video_track_adapter.cc
index 1d9920f1b205f3f680d6b5fe8b671ce2c7566586..6a9c2f4d30d5e7d86e5ee072f64f0b2ea20e57c5 100644
--- a/content/renderer/media/webrtc/webrtc_video_track_adapter.cc
+++ b/content/renderer/media/webrtc/webrtc_video_track_adapter.cc
@@ -44,11 +44,14 @@ class WebRtcVideoTrackAdapter::WebRtcVideoSourceAdapter
   void ReleaseSourceOnMainThread();
 
   void OnVideoFrameOnIO(const scoped_refptr<media::VideoFrame>& frame,
-                        const media::VideoCaptureFormat& format);
+                        const media::VideoCaptureFormat& format,
+                        const base::TimeTicks& estimated_capture_time);
 
  private:
-  void OnVideoFrameOnWorkerThread(const scoped_refptr<media::VideoFrame>& frame,
-                                  const media::VideoCaptureFormat& format);
+  void OnVideoFrameOnWorkerThread(
+      const scoped_refptr<media::VideoFrame>& frame,
+      const media::VideoCaptureFormat& format,
+      const base::TimeTicks& estimated_capture_time);
   friend class base::RefCountedThreadSafe<WebRtcVideoSourceAdapter>;
   virtual ~WebRtcVideoSourceAdapter();
 
@@ -110,18 +113,20 @@ ReleaseSourceOnMainThread() {
 
 void WebRtcVideoTrackAdapter::WebRtcVideoSourceAdapter::OnVideoFrameOnIO(
     const scoped_refptr<media::VideoFrame>& frame,
-    const media::VideoCaptureFormat& format) {
+    const media::VideoCaptureFormat& format,
+    const base::TimeTicks& estimated_capture_time) {
   DCHECK(io_thread_checker_.CalledOnValidThread());
   libjingle_worker_thread_->PostTask(
       FROM_HERE,
       base::Bind(&WebRtcVideoSourceAdapter::OnVideoFrameOnWorkerThread,
-                 this, frame, format));
+                 this, frame, format, estimated_capture_time));
 }
 
 void
 WebRtcVideoTrackAdapter::WebRtcVideoSourceAdapter::OnVideoFrameOnWorkerThread(
     const scoped_refptr<media::VideoFrame>& frame,
-    const media::VideoCaptureFormat& format) {
+    const media::VideoCaptureFormat& format,
+    const base::TimeTicks& estimated_capture_time) {
   DCHECK(libjingle_worker_thread_->BelongsToCurrentThread());
   base::AutoLock auto_lock(capture_adapter_stop_lock_);
   if (capture_adapter_)