Move passing of WebRTC rendering frames from main thread to compositor thread

content/renderer/media/webmediaplayer_ms_compositor.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 CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_COMPOSITOR_H_
 #define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_COMPOSITOR_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 42 matching lines @@
   // find out what web stream this WebMediaPlayerMSCompositor is playing, and
   // together with flag "--disable-rtc-smoothness-algorithm" determine whether
   // we enable algorithm or not.
   WebMediaPlayerMSCompositor(
       const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner,
       const blink::WebMediaStream& web_stream,
       const base::WeakPtr<WebMediaPlayerMS>& player);
 
   ~WebMediaPlayerMSCompositor() override;
 
-  void EnqueueFrame(const scoped_refptr<media::VideoFrame>& frame);
+  void EnqueueFrame(scoped_refptr<media::VideoFrame> frame);
 
   // Statistical data
   gfx::Size GetCurrentSize();
   base::TimeDelta GetCurrentTime();
   size_t total_frame_count() const;
   size_t dropped_frame_count() const;
 
   // VideoFrameProvider implementation.
   void SetVideoFrameProviderClient(
       cc::VideoFrameProvider::Client* client) override;
@@ skipping 82 matching lines @@
   base::Lock current_frame_lock_;
 
   // Make sure the weak pointer factory member is the last member of the class.
   base::WeakPtrFactory<WebMediaPlayerMSCompositor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerMSCompositor);
 };
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_COMPOSITOR_H_