Remove PlatformWheelEvent and use WebMouseWheelEvent instead

third_party/WebKit/public/platform/WebInputEvent.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 391 matching lines @@
         x(0),
         y(0),
         windowX(0),
         windowY(0),
         globalX(0),
         globalY(0),
         movementX(0),
         movementY(0),
         clickCount(0) {}
 
+#if INSIDE_BLINK
+  BLINK_PLATFORM_EXPORT WebFloatPoint movementInRootFrame() const;
+  BLINK_PLATFORM_EXPORT WebFloatPoint positionInRootFrame() const;
+#endif
+
  protected:
   explicit WebMouseEvent(unsigned sizeParam)
       : WebInputEvent(sizeParam),
         WebPointerProperties(),
         x(0),
         y(0),
         windowX(0),
         windowY(0),
         globalX(0),
         globalY(0),
@@ skipping 39 matching lines @@
         movedBeyondSlopRegion(false),
         touchStartOrFirstTouchMove(false),
         uniqueTouchEventId(0) {}
 };
 
 #pragma pack(pop)
 
 }  // namespace blink
 
 #endif