use enum to specify deviceSource for fling animation.

content/renderer/input/input_handler_wrapper.cc

 // 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 "content/renderer/input/input_handler_wrapper.h"
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "content/renderer/input/input_event_filter.h"
 #include "content/renderer/input/input_handler_manager.h"
 #include "third_party/WebKit/public/platform/Platform.h"
@@ skipping 24 matching lines @@
       base::Bind(&RenderViewImpl::TransferActiveWheelFlingAnimation,
                  render_view_impl_,
                  params));
 }
 
 void InputHandlerWrapper::WillShutdown() {
   input_handler_manager_->RemoveInputHandler(routing_id_);
 }
 
 blink::WebGestureCurve* InputHandlerWrapper::CreateFlingAnimationCurve(
-    int deviceSource,
+    blink::WebGestureDevice deviceSource,
     const blink::WebFloatPoint& velocity,
     const blink::WebSize& cumulative_scroll) {
   return blink::Platform::current()->createFlingAnimationCurve(
       deviceSource, velocity, cumulative_scroll);
 }
 
 void InputHandlerWrapper::DidOverscroll(const DidOverscrollParams& params) {
   input_handler_manager_->DidOverscroll(routing_id_, params);
 }
 
 void InputHandlerWrapper::DidStopFlinging() {
   input_handler_manager_->DidStopFlinging(routing_id_);
 }
 
 }  // namespace content