Remove the default wheel event handler from blink.

third_party/WebKit/Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 2147 matching lines @@
             LayoutObject* layoutObject = this->layoutObject();
             while (layoutObject && (!layoutObject->isBox() || !toLayoutBox(layoutObject)->canBeScrolledAndHasScrollableArea()))
                 layoutObject = layoutObject->parent();
 
             if (layoutObject) {
                 if (LocalFrame* frame = document().frame())
                     frame->eventHandler().startPanScrolling(layoutObject);
             }
         }
 #endif
-    } else if ((eventType == EventTypeNames::wheel || eventType == EventTypeNames::mousewheel) && event->hasInterface(EventNames::WheelEvent)) {
-        WheelEvent* wheelEvent = toWheelEvent(event);
-
-        // If we don't have a layoutObject, send the wheel event to the first node we find with a layoutObject.
-        // This is needed for <option> and <optgroup> elements so that <select>s get a wheel scroll.
-        Node* startNode = this;
-        while (startNode && !startNode->layoutObject())
-            startNode = startNode->parentOrShadowHostNode();
-
-        if (startNode && startNode->layoutObject()) {
-            if (LocalFrame* frame = document().frame())
-                frame->eventHandler().defaultWheelEventHandler(startNode, wheelEvent);
-        }
     } else if (event->type() == EventTypeNames::webkitEditableContentChanged) {
         dispatchInputEvent();
     }
 }
 
 void Node::willCallDefaultEventHandler(const Event&)
 {
 }
 
 bool Node::willRespondToMouseMoveEvents()
@@ skipping 306 matching lines @@
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
     else
         fprintf(stderr, "Cannot showNodePath for (nil)\n");
 }
 
 #endif