Log out-of-order frames in chrome://media-internals.

media/filters/video_renderer_algorithm.h

Index: media/filters/video_renderer_algorithm.h
diff --git a/media/filters/video_renderer_algorithm.h b/media/filters/video_renderer_algorithm.h
index 70e29924d2b01db17b86a24ca77bf6e5cc8630d1..0ce78092a3bede603e8c74399e9cb4f79923c191 100644
--- a/media/filters/video_renderer_algorithm.h
+++ b/media/filters/video_renderer_algorithm.h
@@ -22,6 +22,8 @@
 
 namespace media {
 
+class MediaLog;
+
 // VideoRendererAlgorithm manages a queue of VideoFrames from which it chooses
 // frames with the goal of providing a smooth playback experience.  I.e., the
 // selection process results in the best possible uniformity for displayed frame
@@ -48,8 +50,8 @@ namespace media {
 // Combined these three approaches enforce optimal smoothness in many cases.
 class MEDIA_EXPORT VideoRendererAlgorithm {
  public:
-  explicit VideoRendererAlgorithm(
-      const TimeSource::WallClockTimeCB& wall_clock_time_cb);
+  VideoRendererAlgorithm(const TimeSource::WallClockTimeCB& wall_clock_time_cb,
+                         scoped_refptr<MediaLog> media_log);
   ~VideoRendererAlgorithm();
 
   // Chooses the best frame for the interval [deadline_min, deadline_max] based
@@ -265,6 +267,9 @@ class MEDIA_EXPORT VideoRendererAlgorithm {
   // UpdateEffectiveFramesQueued().
   size_t CountEffectiveFramesQueued() const;
 
+  scoped_refptr<MediaLog> media_log_;
+  int out_of_order_frame_logs_ = 0;
+
   // Queue of incoming frames waiting for rendering.
   using VideoFrameQueue = std::deque<ReadyFrame>;
   VideoFrameQueue frame_queue_;