WheelEvent's deltaX/deltaY sign is wrong

Source/core/html/shadow/SpinButtonElement.cpp

 /*
  * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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 139 matching lines @@
 
     if (!event->hasInterface(eventNames().interfaceForWheelEvent))
         return;
 
     if (!m_spinButtonOwner)
         return;
 
     if (!m_spinButtonOwner->shouldSpinButtonRespondToWheelEvents())
         return;
 
-    doStepAction(static_cast<WheelEvent*>(event)->deltaY());
+    doStepAction(static_cast<WheelEvent*>(event)->wheelDeltaY());
     event->setDefaultHandled();
 }
 
 bool SpinButtonElement::willRespondToMouseMoveEvents()
 {
     if (renderBox() && shouldRespondToMouseEvents())
         return true;
 
     return HTMLDivElement::willRespondToMouseMoveEvents();
 }
@@ skipping 78 matching lines @@
         m_upDownState = Indeterminate;
     HTMLDivElement::setHovered(flag);
 }
 
 bool SpinButtonElement::shouldRespondToMouseEvents()
 {
     return !m_spinButtonOwner || m_spinButtonOwner->shouldSpinButtonRespondToMouseEvents();
 }
 
 }