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

webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.cc

Index: webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.cc
diff --git a/webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.cc b/webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ce557dcdf9d2ab43e3f6751b169454b3bfd79c0e
--- /dev/null
+++ b/webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.cc
@@ -0,0 +1,19 @@
+// 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.
+
+#include "webkit/renderer/compositor_bindings/web_to_cc_layer_scroll_client_adapter.h"
+
+#include "third_party/WebKit/public/platform/WebLayerScrollClient.h"
+
+namespace webkit {
+
+WebToCCLayerScrollClientAdapter::WebToCCLayerScrollClientAdapter(
+    WebKit::WebLayerScrollClient* client)
+    : client_(client) {}
+
+void WebToCCLayerScrollClientAdapter::DidScroll() {
+  client_->didScroll();
+}
+
+}  // namespace webkit