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

webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.h

Index: webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.h
diff --git a/webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.h b/webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.h
new file mode 100644
index 0000000000000000000000000000000000000000..776454198a316aedf917750366a85cf3b46b5fae
--- /dev/null
+++ b/webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.h
@@ -0,0 +1,31 @@
+// 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.
+
+#ifndef WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_TO_CC_LAYER_SCROLL_CLIENT_ADAPTER_H_
+#define WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_TO_CC_LAYER_SCROLL_CLIENT_ADAPTER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "cc/layers/layer_scroll_client.h"
+
+namespace WebKit { class WebLayerScrollClient; }
+
+namespace webkit {
+
+class WebToCCLayerScrollClientAdapter : public cc::LayerScrollClient {
+ public:
+  explicit WebToCCLayerScrollClientAdapter(
+      WebKit::WebLayerScrollClient* client);
+
+ private:
+  virtual void DidScroll() OVERRIDE;
+
+  WebKit::WebLayerScrollClient* client_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebToCCLayerScrollClientAdapter);
+};
+
+}  // namespace webkit
+
+#endif  // WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_TO_CC_LAYER_SCROLL_CLIENT_ADAPTER_H_