Roll ffmpeg DEPS for security fix.

media/filters/video_cadence_estimator.cc

Index: media/filters/video_cadence_estimator.cc
diff --git a/media/filters/video_cadence_estimator.cc b/media/filters/video_cadence_estimator.cc
index fbbe836f33e4a7ed09ae638e157c55519e147336..1e3b43c165a09a300a7ab896d42f29aee47476d7 100644
--- a/media/filters/video_cadence_estimator.cc
+++ b/media/filters/video_cadence_estimator.cc
@@ -153,8 +153,6 @@ VideoCadenceEstimator::Cadence VideoCadenceEstimator::CalculateCadence(
     base::TimeDelta frame_duration,
     base::TimeDelta max_acceptable_drift,
     base::TimeDelta* time_until_max_drift) const {
-  DCHECK_LT(max_acceptable_drift, minimum_time_until_max_drift_);
-
   // The perfect cadence is the number of render intervals per frame.
   const double perfect_cadence =
       frame_duration.InSecondsF() / render_interval.InSecondsF();