cc: add layer usage hint to texture layer

webkit/compositor_bindings/web_external_texture_layer_impl.cc

 // Copyright 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/compositor_bindings/web_external_texture_layer_impl.h"
 
 #include "cc/resource_update_queue.h"
 #include "cc/texture_layer.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebExternalTextureLayerClient.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFloatRect.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
 #include "webkit/compositor_bindings/web_layer_impl.h"
 
 using namespace cc;
 
 namespace WebKit {
 
 WebExternalTextureLayerImpl::WebExternalTextureLayerImpl(
-    WebExternalTextureLayerClient* client)
+    WebExternalTextureLayerClient* client, bool single_buffer)
     : client_(client) {
   scoped_refptr<TextureLayer> layer;
   if (client_)
-    layer = TextureLayer::Create(this);
+    layer = TextureLayer::Create(this, single_buffer);
   else
-    layer = TextureLayer::Create(NULL);
+    layer = TextureLayer::Create(NULL, single_buffer);
   layer->SetIsDrawable(true);
   layer_.reset(new WebLayerImpl(layer));
 }
 
 WebExternalTextureLayerImpl::~WebExternalTextureLayerImpl() {
   static_cast<TextureLayer*>(layer_->layer())->ClearClient();
 }
 
 WebLayer* WebExternalTextureLayerImpl::layer() { return layer_.get(); }
 
@@ skipping 51 matching lines @@
   WebTextureUpdaterImpl updater_impl(queue);
   return client_->prepareTexture(updater_impl);
 }
 
 WebGraphicsContext3D* WebExternalTextureLayerImpl::context() {
   DCHECK(client_);
   return client_->context();
 }
 
 }  // namespace WebKit