use enum to specify deviceSource for fling animation.

content/browser/renderer_host/input/web_input_event_util.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/browser/renderer_host/input/web_input_event_util.h"
 
 #include "base/strings/string_util.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "ui/events/gesture_detection/gesture_event_data.h"
 #include "ui/events/gesture_detection/motion_event.h"
@@ skipping 221 matching lines @@
 
   return result;
 }
 
 WebGestureEvent CreateWebGestureEventFromGestureEventData(
     const ui::GestureEventData& data) {
   WebGestureEvent gesture;
   gesture.x = data.x;
   gesture.y = data.y;
   gesture.timeStampSeconds = (data.time - base::TimeTicks()).InSecondsF();
-  gesture.sourceDevice = WebGestureEvent::Touchscreen;
+  gesture.sourceDevice = blink::WebGestureDeviceTouchpad;
 
   switch (data.type) {
     case ui::ET_GESTURE_SHOW_PRESS:
       gesture.type = WebInputEvent::GestureShowPress;
       gesture.data.showPress.width = data.details.bounding_box_f().width();
       gesture.data.showPress.height = data.details.bounding_box_f().height();
       break;
     case ui::ET_GESTURE_DOUBLE_TAP:
       gesture.type = WebInputEvent::GestureDoubleTap;
       DCHECK_EQ(1, data.details.tap_count());
@@ skipping 71 matching lines @@
       break;
     default:
       NOTREACHED() << "ui::EventType provided wasn't a valid gesture event.";
       break;
   }
 
   return gesture;
 }
 
 }  // namespace content