Remove a bunch of frame-level scrolling machinery.

sky/engine/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
@@ skipping 325 matching lines @@
 {
     if (m_webView->client())
         m_webView->client()->didChangeCursor(cursor);
 }
 
 String ChromeClientImpl::acceptLanguages()
 {
     return m_webView->client()->acceptLanguages();
 }
 
-bool ChromeClientImpl::paintCustomOverhangArea(GraphicsContext* context, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect)
-{
-    return false;
-}
-
 GraphicsLayerFactory* ChromeClientImpl::graphicsLayerFactory() const
 {
     return m_webView->graphicsLayerFactory();
 }
 
 void ChromeClientImpl::attachRootGraphicsLayer(GraphicsLayer* rootLayer)
 {
     m_webView->setRootGraphicsLayer(rootLayer);
 }
 
@@ skipping 55 matching lines @@
         webFrame->client()->forwardInputEvent(&webEvent);
     } else if (event->isWheelEvent()) {
         WebMouseWheelEventBuilder webEvent(webFrame->frameView(), 0, *static_cast<WheelEvent*>(event));
         if (webEvent.type == WebInputEvent::Undefined)
             return;
         webFrame->client()->forwardInputEvent(&webEvent);
     }
 }
 
 } // namespace blink