Make painting a single frame a permanent API on VideoRendererSink.

media/base/null_video_sink.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_AUDIO_NULL_VIDEO_SINK_H_
 #define MEDIA_AUDIO_NULL_VIDEO_SINK_H_
 
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "base/time/default_tick_clock.h"
@@ skipping 17 matching lines @@
   // |new_frame_cb| will be called for each new frame received.
   NullVideoSink(bool clockless,
                 base::TimeDelta interval,
                 const NewFrameCB& new_frame_cb,
                 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
   ~NullVideoSink() override;
 
   // VideoRendererSink implementation.
   void Start(RenderCallback* callback) override;
   void Stop() override;
-  void PaintFrameUsingOldRenderingPath(
-      const scoped_refptr<VideoFrame>& frame) override;
+  void PaintSingleFrame(const scoped_refptr<VideoFrame>& frame) override;
 
   void set_tick_clock_for_testing(base::TickClock* tick_clock) {
     tick_clock_ = tick_clock;
   }
 
   // Sets |stop_cb_|, which will be fired when Stop() is called.
   void set_stop_cb(const base::Closure& stop_cb) {
     stop_cb_ = stop_cb;
   }
 
@@ skipping 37 matching lines @@
 
   // Value passed to RenderCallback::Render().
   bool background_render_;
 
   DISALLOW_COPY_AND_ASSIGN(NullVideoSink);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_NULL_VIDEO_SINK_H_