Create movementX/Y on MouseEvent

Source/core/events/MouseRelatedEvent.h

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 21 matching lines @@
     // Internal only: Helper class for what's common between mouse and wheel events.
     class MouseRelatedEvent : public UIEventWithKeyState {
     public:
         // Note that these values are adjusted to counter the effects of zoom, so that values
         // exposed via DOM APIs are invariant under zooming.
         int screenX() const { return m_screenLocation.x(); }
         int screenY() const { return m_screenLocation.y(); }
         const IntPoint& screenLocation() const { return m_screenLocation; }
         int clientX() const { return m_clientLocation.x(); }
         int clientY() const { return m_clientLocation.y(); }
-        int webkitMovementX() const { return m_movementDelta.x(); }
-        int webkitMovementY() const { return m_movementDelta.y(); }
+        int movementX() const { return m_movementDelta.x(); }
+        int movementY() const { return m_movementDelta.y(); }
         const LayoutPoint& clientLocation() const { return m_clientLocation; }
         virtual int layerX() OVERRIDE FINAL;
         virtual int layerY() OVERRIDE FINAL;
         int offsetX();
         int offsetY();
         bool isSimulated() const { return m_isSimulated; }
         virtual int pageX() const OVERRIDE FINAL;
         virtual int pageY() const OVERRIDE FINAL;
         int x() const;
         int y() const;
@@ skipping 29 matching lines @@
         LayoutPoint m_layerLocation;
         LayoutPoint m_offsetLocation;
         LayoutPoint m_absoluteLocation;
         bool m_isSimulated;
         bool m_hasCachedRelativePosition;
     };
 
 } // namespace WebCore
 
 #endif // MouseRelatedEvent_h