cc: Create a LayerScrollClient interface and an adapter class in compositor_bindings.

webkit/renderer/compositor_bindings/web_layer_impl.h

 // 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.
 
 #ifndef WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_H_
 #define WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebAnimation.h"
 #include "third_party/WebKit/public/platform/WebColor.h"
 #include "third_party/WebKit/public/platform/WebCompositingReasons.h"
 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
 #include "third_party/WebKit/public/platform/WebLayer.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/skia/include/utils/SkMatrix44.h"
 #include "webkit/renderer/compositor_bindings/webkit_compositor_bindings_export.h"
 
 namespace cc { class Layer; }
 
 // TODO(senorblanco):  Remove this once WebKit changes have landed.
 class SkImageFilter;
 
 namespace WebKit {
-class WebAnimationDelegate;
 class WebFilterOperations;
-class WebLayerScrollClient;
 struct WebFloatRect;
 }
 
 namespace webkit {
 
 class WebToCCAnimationDelegateAdapter;
+class WebToCCLayerScrollClientAdapter;
 
 class WebLayerImpl : public WebKit::WebLayer {
  public:
   WEBKIT_COMPOSITOR_BINDINGS_EXPORT WebLayerImpl();
   WEBKIT_COMPOSITOR_BINDINGS_EXPORT explicit WebLayerImpl(
       scoped_refptr<cc::Layer>);
   virtual ~WebLayerImpl();
 
   WEBKIT_COMPOSITOR_BINDINGS_EXPORT cc::Layer* layer() const;
 
@@ skipping 70 matching lines @@
       const WebKit::WebLayerPositionConstraint& constraint);
   virtual WebKit::WebLayerPositionConstraint positionConstraint() const;
   virtual void setScrollClient(WebKit::WebLayerScrollClient* client);
   virtual bool isOrphan() const;
 
  protected:
   scoped_refptr<cc::Layer> layer_;
 
  private:
   scoped_ptr<WebToCCAnimationDelegateAdapter> animation_delegate_adapter_;
+  scoped_ptr<WebToCCLayerScrollClientAdapter> layer_scroll_client_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(WebLayerImpl);
 };
 
 }  // namespace webkit
 
 #endif  // WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_H_