Add support for DOM Level 3 WheelEvent

Source/core/page/DOMWindow.cpp

Index: Source/core/page/DOMWindow.cpp
diff --git a/Source/core/page/DOMWindow.cpp b/Source/core/page/DOMWindow.cpp
index a7f252fee30a880083f10f00aabc39c36fa7c799..d7208fad0dc64c3101e8311c8f757d54494e0467 100644
--- a/Source/core/page/DOMWindow.cpp
+++ b/Source/core/page/DOMWindow.cpp
@@ -1406,7 +1406,7 @@ bool DOMWindow::addEventListener(const AtomicString& eventType, PassRefPtr<Event
 
     if (Document* document = this->document()) {
         document->addListenerTypeIfNeeded(eventType);
-        if (eventType == eventNames().mousewheelEvent)
+        if (eventType == eventNames().wheelEvent || eventType == eventNames().mousewheelEvent)
             document->didAddWheelEventHandler();
         else if (eventNames().isTouchEventType(eventType))
             document->didAddTouchEventHandler(document);
@@ -1443,7 +1443,7 @@ bool DOMWindow::removeEventListener(const AtomicString& eventType, EventListener
         return false;
 
     if (Document* document = this->document()) {
-        if (eventType == eventNames().mousewheelEvent)
+        if (eventType == eventNames().wheelEvent || eventType == eventNames().mousewheelEvent)
             document->didRemoveWheelEventHandler();
         else if (eventNames().isTouchEventType(eventType))
             document->didRemoveTouchEventHandler(document);