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

content/renderer/media/webmediaplayer_ms_compositor.cc

 // 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.
 
 #include "content/renderer/media/webmediaplayer_ms_compositor.h"
 
 #include <stdint.h>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 185 matching lines @@
   DCHECK(compositor_task_runner_->BelongsToCurrentThread());
   if (video_frame_provider_client_)
     video_frame_provider_client_->StopUsingProvider();
 
   video_frame_provider_client_ = client;
   if (video_frame_provider_client_ && !stopped_)
     video_frame_provider_client_->StartRendering();
 }
 
 void WebMediaPlayerMSCompositor::EnqueueFrame(
-    const scoped_refptr<media::VideoFrame>& frame) {
-  DCHECK(thread_checker_.CalledOnValidThread());
+    scoped_refptr<media::VideoFrame> frame) {
+  DCHECK(compositor_task_runner_->BelongsToCurrentThread());
   base::AutoLock auto_lock(current_frame_lock_);
   ++total_frame_count_;
 
   // With algorithm off, just let |current_frame_| hold the incoming |frame|.
   if (!rendering_frame_buffer_) {
     SetCurrentFrame(frame);
     return;
   }
 
   // This is a signal frame saying that the stream is stopped.
@@ skipping 220 matching lines @@
   }
 
   if (!rendering_frame_buffer_) {
     rendering_frame_buffer_.reset(new media::VideoRendererAlgorithm(
         base::Bind(&WebMediaPlayerMSCompositor::MapTimestampsToRenderTimeTicks,
                    base::Unretained(this))));
   }
 }
 
 }  // namespace content