Fix Bug: Video with Variable Frame Rate plays at incorrect speed.

media/filters/video_cadence_estimator.h

Index: media/filters/video_cadence_estimator.h
diff --git a/media/filters/video_cadence_estimator.h b/media/filters/video_cadence_estimator.h
index b1a79e6a002262ae967d5ad03dc42466f8ff0739..f3d589ad2e7ec6196f89b2b09ccf509156115f0c 100644
--- a/media/filters/video_cadence_estimator.h
+++ b/media/filters/video_cadence_estimator.h
@@ -88,6 +88,7 @@ class MEDIA_EXPORT VideoCadenceEstimator {
   // Returns true if the cadence has changed since the last call.
   bool UpdateCadenceEstimate(base::TimeDelta render_interval,
                              base::TimeDelta frame_duration,
+                             base::TimeDelta frame_duration_deviation,
                              base::TimeDelta max_acceptable_drift);
 
   // Returns true if a useful cadence was found.
@@ -153,6 +154,8 @@ class MEDIA_EXPORT VideoCadenceEstimator {
   // cadence for a given render interval and frame duration.
   const base::TimeDelta minimum_time_until_max_drift_;
 
+  bool is_variable_frame_rate_;
+
   DISALLOW_COPY_AND_ASSIGN(VideoCadenceEstimator);
 };