[Feature might be dropped] VideoPlaybackQuality.totalFrameDelay

media/filters/video_renderer_impl.cc

Index: media/filters/video_renderer_impl.cc
diff --git a/media/filters/video_renderer_impl.cc b/media/filters/video_renderer_impl.cc
index 25099ca0f84a7a06a6761af150cc01c17f022b4d..ac21c3a4e73f81e2d07a224a47a791bee2eaa427 100644
--- a/media/filters/video_renderer_impl.cc
+++ b/media/filters/video_renderer_impl.cc
@@ -42,6 +42,7 @@ VideoRendererImpl::VideoRendererImpl(
       last_painted_timestamp_(kNoTimestamp()),
       frames_decoded_(0),
       frames_dropped_(0),
+      frames_delay_time_(0),
       is_shutting_down_(false),
       weak_factory_(this) {
   DCHECK(!paint_cb_.is_null());
@@ -270,6 +271,9 @@ void VideoRendererImpl::PaintNextReadyFrame_Locked() {
 
   paint_cb_.Run(next_frame);
 
+  base::TimeDelta now = get_time_cb_.Run();
+  frames_delay_time_ += (now - last_painted_timestamp_).InSecondsF();
+
   task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&VideoRendererImpl::AttemptRead, weak_factory_.GetWeakPtr()));
@@ -466,10 +470,12 @@ void VideoRendererImpl::UpdateStatsAndWait_Locked(
     PipelineStatistics statistics;
     statistics.video_frames_decoded = frames_decoded_;
     statistics.video_frames_dropped = frames_dropped_;
+    statistics.total_frame_delay = frames_delay_time_;
     task_runner_->PostTask(FROM_HERE, base::Bind(statistics_cb_, statistics));
 
     frames_decoded_ = 0;
     frames_dropped_ = 0;
+    frames_delay_time_ = 0;
   }
 
   frame_available_.TimedWait(wait_duration);