Add support for DOM Level 3 WheelEvent

Source/core/dom/WheelEvent.cpp

Index: Source/core/dom/WheelEvent.cpp
diff --git a/Source/core/dom/WheelEvent.cpp b/Source/core/dom/WheelEvent.cpp
index c7bdf0d638023da48258ed4e3d9b1671e84ecf11..d19740de9e1c77709774470862b8e185f388af84 100644
--- a/Source/core/dom/WheelEvent.cpp
+++ b/Source/core/dom/WheelEvent.cpp
@@ -30,8 +30,8 @@
 namespace WebCore {
 
 WheelEventInit::WheelEventInit()
-    : wheelDeltaX(0)
-    , wheelDeltaY(0)
+    : deltaX(0)
+    , deltaY(0)
     , deltaMode(WheelEvent::DOM_DELTA_PIXEL)
 {
 }
@@ -45,7 +45,7 @@ WheelEvent::WheelEvent()
 
 WheelEvent::WheelEvent(const AtomicString& type, const WheelEventInit& initializer)
     : MouseEvent(type, initializer)
-    , m_wheelDelta(IntPoint(initializer.wheelDeltaX, initializer.wheelDeltaY))
+    , m_wheelDelta(IntPoint(initializer.deltaX, initializer.deltaY))
     , m_deltaMode(initializer.deltaMode)
 {
     ScriptWrappable::init(this);
@@ -54,7 +54,7 @@ WheelEvent::WheelEvent(const AtomicString& type, const WheelEventInit& initializ
 WheelEvent::WheelEvent(const FloatPoint& wheelTicks, const FloatPoint& rawDelta, unsigned deltaMode,
     PassRefPtr<AbstractView> view, const IntPoint& screenLocation, const IntPoint& pageLocation,
     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool directionInvertedFromDevice)
-    : MouseEvent(eventNames().mousewheelEvent,
+    : MouseEvent(eventNames().wheelEvent,
                  true, true, view, 0, screenLocation.x(), screenLocation.y(),
                  pageLocation.x(), pageLocation.y(),
                  0, 0,
@@ -74,7 +74,7 @@ void WheelEvent::initWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtr<Abstrac
     if (dispatched())
         return;
 
-    initUIEvent(eventNames().mousewheelEvent, true, true, view, 0);
+    initUIEvent(eventNames().wheelEvent, true, true, view, 0);
 
     m_screenLocation = IntPoint(screenX, screenY);
     m_ctrlKey = ctrlKey;