use enum to specify deviceSource for fling animation.

content/renderer/render_widget_fullscreen_pepper.cc

 // Copyright (c) 2012 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/render_widget_fullscreen_pepper.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 57 matching lines @@
   switch (gesture.type) {
     case WebInputEvent::GestureScrollBegin:
       mouse.type = WebInputEvent::MouseDown;
       break;
 
     case WebInputEvent::GestureScrollUpdate:
       mouse.type = WebInputEvent::MouseMove;
       break;
 
     case WebInputEvent::GestureFlingStart:
-      if (gesture.sourceDevice == WebGestureEvent::Touchscreen) {
+      if (gesture.sourceDevice == blink::WebGestureDeviceTouchpad) {
         // A scroll gesture on the touchscreen may end with a GestureScrollEnd
         // when there is no velocity, or a GestureFlingStart when it has a
         // velocity. In both cases, it should end the drag that was initiated by
         // the GestureScrollBegin (and subsequent GestureScrollUpdate) events.
         mouse.type = WebInputEvent::MouseUp;
         break;
       } else {
         return mouse;
       }
     case WebInputEvent::GestureScrollEnd:
@@ skipping 300 matching lines @@
 }
 
 void RenderWidgetFullscreenPepper::SetDeviceScaleFactor(
     float device_scale_factor) {
   RenderWidget::SetDeviceScaleFactor(device_scale_factor);
   if (compositor_)
     compositor_->setDeviceScaleFactor(device_scale_factor);
 }
 
 }  // namespace content