Delegate root layer scroll offset to android_webview.

content/renderer/android/synchronous_compositor_input_handler_client_wrapper.h

+// Copyright (c) 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 CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_INPUT_HANDLER_CLIENT_WRAPPER_H_
+#define CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_INPUT_HANDLER_CLIENT_WRAPPER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/input/input_handler.h"
+
+namespace cc {
+class InputHandler;
+class InputHandlerClient;
+class LayerScrollOffsetDelegate;
+}
+
+namespace content {
+
+class SynchronousCompositorClient;
+

[joth, 2013/05/16 18:21:42]

commentette?

+class SynchronousCompositorInputHandlerClientWrapper
+    : public cc::InputHandlerClient {
+ public:
+  SynchronousCompositorInputHandlerClientWrapper(
+      scoped_ptr<cc::InputHandlerClient> wrapped_client,
+      cc::LayerScrollOffsetDelegate* layer_scroll_offset_delegate);
+  virtual ~SynchronousCompositorInputHandlerClientWrapper();
+
+  virtual void BindToHandler(cc::InputHandler* handler) OVERRIDE;
+  virtual void Animate(base::TimeTicks time) OVERRIDE;
+  virtual void MainThreadHasStoppedFlinging() OVERRIDE;
+
+ private:
+  scoped_ptr<cc::InputHandlerClient> wrapped_client_;
+  cc::LayerScrollOffsetDelegate* layer_scroll_offset_delegate_;
+  cc::InputHandler* handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorInputHandlerClientWrapper);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_INPUT_HANDLER_CLIENT_WRAPPER_H_
+