Remove the default wheel event handler from blink.

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

Index: third_party/WebKit/Source/core/dom/Node.cpp
diff --git a/third_party/WebKit/Source/core/dom/Node.cpp b/third_party/WebKit/Source/core/dom/Node.cpp
index 5af1c855cd7ffe772c342718393b3eae9f3b3bc5..c0853351774bffbdfa5051e2dc6152fc5c16f15d 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -2165,19 +2165,6 @@ void Node::defaultEventHandler(Event* event)
             }
         }
 #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();
     }