Delegate root layer scroll offset to android_webview.

content/renderer/gpu/input_handler_proxy.cc

 // 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.
 
 #include "content/renderer/gpu/input_handler_proxy.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "content/renderer/gpu/input_handler_proxy_client.h"
 #include "third_party/WebKit/public/platform/Platform.h"
@@ skipping 28 matching lines @@
   input_handler_ = NULL;
   DCHECK(client_);
   client_->WillShutdown();
 }
 
 void InputHandlerProxy::SetClient(InputHandlerProxyClient* client) {
   DCHECK(!client_ || !client);
   client_ = client;
 }
 
+void InputHandlerProxy::SetRootLayerScrollOffsetDelegate(
+    cc::LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate) {
+  input_handler_->SetRootLayerScrollOffsetDelegate(
+      root_layer_scroll_offset_delegate);
+}
+
 void InputHandlerProxy::HandleInputEvent(const WebInputEvent& event) {
   DCHECK(client_);
   DCHECK(input_handler_);
 
   InputHandlerProxy::EventDisposition disposition =
       HandleInputEventInternal(event);
   switch (disposition) {
     case DidHandle:
       client_->DidHandleInputEvent();
       break;
@@ skipping 343 matching lines @@
   TRACE_EVENT2("renderer",
                "InputHandlerProxy::notifyCurrentFlingVelocity",
                "vx",
                velocity.width,
                "vy",
                velocity.height);
   input_handler_->NotifyCurrentFlingVelocity(ToClientScrollIncrement(velocity));
 }
 
 }  // namespace content