Delegate root layer scroll offset to android_webview.

content/renderer/gpu/input_handler_proxy.h

Index: content/renderer/gpu/input_handler_proxy.h
diff --git a/content/renderer/gpu/input_handler_proxy.h b/content/renderer/gpu/input_handler_proxy.h
index c3f0fc25907d8d2fade3ecca8303d4c71d8b9879..f7caac9774724b41552449565583a2e0b203659c 100644
--- a/content/renderer/gpu/input_handler_proxy.h
+++ b/content/renderer/gpu/input_handler_proxy.h
@@ -9,6 +9,7 @@
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/input/input_handler.h"
+#include "cc/input/layer_scroll_offset_delegate.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGestureCurve.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGestureCurveTarget.h"
@@ -31,6 +32,8 @@ class CONTENT_EXPORT InputHandlerProxy
   virtual ~InputHandlerProxy();
 
   void SetClient(InputHandlerProxyClient* client);
+  void SetRootLayerScrollOffsetDelegate(
+      cc::LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate);
   void HandleInputEvent(const WebKit::WebInputEvent& event);
 
   // cc::InputHandlerClient implementation.