use enum to specify deviceSource for fling animation

public/web/WebActiveWheelFlingParameters.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebActiveWheelFlingParameters_h
 #define WebActiveWheelFlingParameters_h
 
 #include "../platform/WebCommon.h"
 #include "../platform/WebFloatPoint.h"
+#include "../platform/WebGestureDevice.h"
 #include "../platform/WebPoint.h"
 #include "../platform/WebSize.h"
 #include "WebInputEvent.h"
 
 namespace blink {
 
 struct WebActiveWheelFlingParameters {
     WebFloatPoint delta;
     WebPoint point;
     WebPoint globalPoint;
     int modifiers;
-    WebGestureEvent::SourceDevice sourceDevice;
+    // TODO(rjkroege): Restore typing once chromium side lands
+    // (http://crbug.com/343327)
+    int sourceDevice;
     WebSize cumulativeScroll;
     double startTime;
 
     WebActiveWheelFlingParameters()
         : modifiers(0)
-        , sourceDevice(WebGestureEvent::Touchpad)
+        , sourceDevice(WebGestureDeviceTouchpad)
         , startTime(0)
     {
     }
 };
 
 }
 
 #endif