Add support for DOM Level 3 WheelEvent

Source/web/WebInputEventConversion.cpp

 /*
  * 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 560 matching lines @@
     globalY = event.globalPosition().y();
     movementX = event.movementDelta().x() * scale;
     movementY = event.movementDelta().y() * scale;
 
     button = static_cast<Button>(event.button());
     clickCount = event.clickCount();
 }
 
 WebMouseWheelEventBuilder::WebMouseWheelEventBuilder(const Widget* widget, const WebCore::RenderObject* renderObject, const WheelEvent& event)
 {
-    if (event.type() != eventNames().mousewheelEvent)
+    if (event.type() != eventNames().wheelEvent && event.type() != eventNames().mousewheelEvent)
         return;
     type = WebInputEvent::MouseWheel;
     updateWebMouseEventFromWebCoreMouseEvent(event, *widget, *renderObject, *this);
     deltaX = static_cast<float>(event.rawDeltaX());
     deltaY = static_cast<float>(event.rawDeltaY());
-    // The 120 is from WheelEvent::initWheelEvent().
-    wheelTicksX = static_cast<float>(event.wheelDeltaX()) / 120;
-    wheelTicksY = static_cast<float>(event.wheelDeltaY()) / 120;
+    wheelTicksX = static_cast<float>(event.wheelDeltaX()) / WheelEvent::TickMultiplier;
+    wheelTicksY = static_cast<float>(event.wheelDeltaY()) / WheelEvent::TickMultiplier;
     scrollByPage = event.deltaMode() == WheelEvent::DOM_DELTA_PAGE;
 }
 
 WebKeyboardEventBuilder::WebKeyboardEventBuilder(const KeyboardEvent& event)
 {
     if (event.type() == eventNames().keydownEvent)
         type = KeyDown;
     else if (event.type() == eventNames().keyupEvent)
         type = WebInputEvent::KeyUp;
     else if (event.type() == eventNames().keypressEvent)
@@ skipping 139 matching lines @@
     modifiers = getWebInputModifiers(event);
 
     globalX = event.screenX();
     globalY = event.screenY();
     IntPoint localPoint = convertAbsoluteLocationForRenderObject(event.absoluteLocation(), *renderObject);
     x = localPoint.x();
     y = localPoint.y();
 }
 
 } // namespace WebKit