use enum to specify deviceSource for fling animation.

content/browser/devtools/renderer_overrides_handler.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/browser/devtools/renderer_overrides_handler.h"
 
 #include <map>
 #include <string>
 
 #include "base/barrier_closure.h"
@@ skipping 915 matching lines @@
 RendererOverridesHandler::InputDispatchGestureEvent(
     scoped_refptr<DevToolsProtocol::Command> command) {
   base::DictionaryValue* params = command->params();
   if (!params)
     return NULL;
 
   RenderViewHostImpl* host = static_cast<RenderViewHostImpl*>(
       agent_->GetRenderViewHost());
   blink::WebGestureEvent event;
   ParseGenericInputParams(params, &event);
-  event.sourceDevice = WebGestureEvent::Touchscreen;
+  event.sourceDevice = blink::WebGestureDeviceTouchpad;
 
   std::string type;
   if (params->GetString(devtools::Input::dispatchGestureEvent::kParamType,
                         &type)) {
     if (type ==
         devtools::Input::dispatchGestureEvent::Type::kEnumScrollBegin)
       event.type = WebInputEvent::GestureScrollBegin;
     else if (type ==
         devtools::Input::dispatchGestureEvent::Type::kEnumScrollUpdate)
       event.type = WebInputEvent::GestureScrollUpdate;
@@ skipping 51 matching lines @@
       return NULL;
     }
     event.data.pinchUpdate.scale = static_cast<float>(scale);
   }
 
   host->ForwardGestureEvent(event);
   return command->SuccessResponse(NULL);
 }
 
 }  // namespace content