Remove special wheel handling path from ScrollableArea

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 2919 matching lines @@
 {
     ASSERT(child->parent() == this);
 
     if (child->isFrameView())
         removeScrollableArea(toFrameView(child));
 
     child->setParent(0);
     m_children.remove(child);
 }
 
-ScrollResult FrameView::wheelEvent(const PlatformWheelEvent& wheelEvent)
-{
-    if (!isScrollable())
-        return ScrollResult();
-
-    if (m_frame->settings()->rootLayerScrolls())
-        return ScrollResult();
-
-    return ScrollableArea::handleWheel(wheelEvent);
-}
-
 bool FrameView::isVerticalDocument() const
 {
     LayoutView* layoutView = this->layoutView();
     if (!layoutView)
         return true;
 
     return layoutView->style()->isHorizontalWritingMode();
 }
 
 bool FrameView::isFlippedDocument() const
@@ skipping 1017 matching lines @@
 
     if (!graphicsLayer)
         return;
 
     DeprecatedPaintLayer::mapRectToPaintInvalidationBacking(localFrame->contentLayoutObject(), paintInvalidationContainer, viewRect);
 
     graphicsLayerTimingRequests.add(graphicsLayer, Vector<std::pair<int64_t, WebRect>>()).storedValue->value.append(std::make_pair(m_frame->frameID(), enclosingIntRect(viewRect)));
 }
 
 } // namespace blink