Remove some dead scrolling paths and unused params

Source/web/WebPagePopupImpl.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 79 matching lines @@
 #endif
     }
 
     virtual void invalidateContentsAndRootView(const IntRect& paintRect) OVERRIDE
     {
         if (paintRect.isEmpty())
             return;
         m_popup->widgetClient()->didInvalidateRect(paintRect);
     }
 
-    virtual void scroll(const IntSize& scrollDelta, const IntRect& scrollRect, const IntRect& clipRect) OVERRIDE
-    {
-        m_popup->widgetClient()->didScrollRect(scrollDelta.width(), scrollDelta.height(), intersection(scrollRect, clipRect));
-    }
-
     virtual void invalidateContentsForSlowScroll(const IntRect& updateRect) OVERRIDE
     {
         invalidateContentsAndRootView(updateRect);
     }
 
     virtual void scheduleAnimation() OVERRIDE
     {
         if (m_popup->isAcceleratedCompositingActive()) {
             ASSERT(m_popup->m_layerTreeView);
             m_popup->m_layerTreeView->setNeedsAnimate();
@@ skipping 284 matching lines @@
     // A WebPagePopupImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
     //    WebPagePopupImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the WebViewImpl is unaware of it.
     return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 } // namespace blink