Remove dead notification for number of wheel event handlers

Source/core/frame/EventHandlerRegistry.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/frame/EventHandlerRegistry.h"
 
 #include "core/events/ThreadLocalEventNames.h"
 #include "core/frame/DOMWindow.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 139 matching lines @@
             continue;
         }
         for (unsigned count = target.getEventListeners(eventTypes[i]).size(); count > 0; --count)
             updateEventHandlerInternal(op, handlerClass, &target);
     }
 }
 
 void EventHandlerRegistry::notifyHasHandlersChanged(EventHandlerClass handlerClass, bool hasActiveHandlers)
 {
     ScrollingCoordinator* scrollingCoordinator = m_frameHost.page().scrollingCoordinator();
-    LocalFrame* mainFrame = m_frameHost.page().mainFrame();
 
     switch (handlerClass) {
     case ScrollEvent:
         if (scrollingCoordinator)
             scrollingCoordinator->updateHaveScrollEventHandlers();
         break;
     case WheelEvent:
-        if (mainFrame) {
-            // FIXME: This notification is wired up to a black hole, so remove it.
-            mainFrame->notifyChromeClientWheelEventHandlerCountChanged();
-        }
         if (scrollingCoordinator)
             scrollingCoordinator->updateHaveWheelEventHandlers();
         break;
 #if ASSERT_ENABLED
     case EventsForTesting:
         break;
 #endif
     default:
         ASSERT_NOT_REACHED();
         break;
@@ skipping 69 matching lines @@
                 ASSERT(window->frame());
                 ASSERT(window->frame()->host());
                 ASSERT(window->frame()->host() == &m_frameHost);
             }
         }
     }
 #endif // ASSERT_ENABLED
 }
 
 } // namespace WebCore