Set WebMediaPlayer as an opaque layer

content/renderer/media/webmediaplayer_ms.cc

 // Copyright 2013 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.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 491 matching lines @@
     received_first_frame_ = true;
     SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
     SetReadyState(WebMediaPlayer::ReadyStateHaveEnoughData);
 
     if (video_frame_provider_.get()) {
       ignore_result(frame->metadata()->GetRotation(
           media::VideoFrameMetadata::ROTATION, &video_rotation_));
 
       video_weblayer_.reset(new cc_blink::WebLayerImpl(
           cc::VideoLayer::Create(compositor_.get(), video_rotation_)));
-      video_weblayer_->layer()->SetContentsOpaque(false);
+      video_weblayer_->layer()->SetContentsOpaque(true);
       video_weblayer_->SetContentsOpaqueIsFixed(true);
       get_client()->setWebLayer(video_weblayer_.get());
     }
   }
 
   compositor_->EnqueueFrame(frame);
 }
 
 void WebMediaPlayerMS::RepaintInternal() {
   DVLOG(1) << __func__;
@@ skipping 28 matching lines @@
 void WebMediaPlayerMS::ResetCanvasCache() {
   DCHECK(thread_checker_.CalledOnValidThread());
   video_renderer_.ResetCache();
 }
 
 void WebMediaPlayerMS::TriggerResize() {
   get_client()->sizeChanged();
 }
 
 }  // namespace content