cc: Block the main thread for texture layers during impl-side painting

cc/texture_layer.cc

 // Copyright 2010 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 "cc/texture_layer.h"
 
 #include "cc/layer_tree_host.h"
 #include "cc/texture_layer_client.h"
 #include "cc/texture_layer_impl.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
@@ skipping 138 matching lines @@
     textureLayer->setPremultipliedAlpha(m_premultipliedAlpha);
     textureLayer->setTextureId(m_textureId);
     m_contentCommitted = drawsContent();
 }
 
 bool TextureLayer::blocksPendingCommit() const
 {
     // Double-buffered texture layers need to be blocked until they can be made
     // triple-buffered.  Single-buffered layers already prevent draws, so
     // can block too for simplicity.
-    return true;
+    return drawsContent();
 }
 
 }  // namespace cc