Adjust VideoRendererAlgorithm for |frame_dropping_disabled_|

media/filters/video_renderer_algorithm.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FILTERS_VIDEO_RENDERER_ALGORITHM_H_
 #define MEDIA_FILTERS_VIDEO_RENDERER_ALGORITHM_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 243 matching lines @@
   // |start_time|.
   base::TimeDelta CalculateAbsoluteDriftForFrame(base::TimeTicks deadline_min,
                                                  int frame_index) const;
 
   // Updates |effective_frames_queued_| which is typically called far more
   // frequently (~4x) than the value changes.  This must be called whenever
   // frames are added or removed from the queue or when any property of a
   // ReadyFrame within the queue changes.
   void UpdateEffectiveFramesQueued();
 
+  // Computes the unclamped count of effective frames.  Used by
+  // UpdateEffectiveFramesQueued().
+  size_t CountEffectiveFramesQueued() const;
+
   // Queue of incoming frames waiting for rendering.
   using VideoFrameQueue = std::deque<ReadyFrame>;
   VideoFrameQueue frame_queue_;
 
   // Handles cadence detection and frame cadence assignments.
   VideoCadenceEstimator cadence_estimator_;
 
   // Indicates if any calls to Render() have successfully yielded a frame yet.
   bool have_rendered_frames_;
 
@@ skipping 53 matching lines @@
   // Current number of effective frames in the |frame_queue_|.  Updated by calls
   // to UpdateEffectiveFramesQueued() whenever the |frame_queue_| is changed.
   size_t effective_frames_queued_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererAlgorithm);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VIDEO_RENDERER_ALGORITHM_H_