Disable accelerated compositing for audio-only <video> tags.

webkit/media/webmediaplayer_impl.cc

 // Copyright (c) 2011 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 "webkit/media/webmediaplayer_impl.h"
 
 #include <limits>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 740 matching lines @@
     // Only keep one time range starting from 0.
     WebKit::WebTimeRanges new_buffered(static_cast<size_t>(1));
     new_buffered[0].start = 0.0f;
     new_buffered[0].end =
         static_cast<float>(pipeline_->GetMediaDuration().InSecondsF());
     buffered_.swap(new_buffered);
 
     if (hasVideo()) {
       UMA_HISTOGRAM_BOOLEAN("Media.AcceleratedCompositingActive",
                             is_accelerated_compositing_active_);
+    } else {
+      GetClient()->disableAcceleratedCompositing();
     }
 
     if (pipeline_->IsLocalSource())
       SetNetworkState(WebKit::WebMediaPlayer::Loaded);
 
     SetReadyState(WebKit::WebMediaPlayer::HaveMetadata);
     // Fire canplaythrough immediately after playback begins because of
     // crbug.com/106480.
     // TODO(vrk): set ready state to HaveFutureData when bug above is fixed.
     SetReadyState(WebKit::WebMediaPlayer::HaveEnoughData);
@@ skipping 163 matching lines @@
   return client_;
 }
 
 void WebMediaPlayerImpl::IncrementExternallyAllocatedMemory() {
   DCHECK_EQ(main_loop_, MessageLoop::current());
   incremented_externally_allocated_memory_ = true;
   v8::V8::AdjustAmountOfExternalAllocatedMemory(kPlayerExtraMemory);
 }
 
 }  // namespace webkit_media