Remove some dead scrolling paths and unused params

Source/web/WebPopupMenuImpl.cpp

 /*
  * Copyright (C) 2009 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 370 matching lines @@
 
 void WebPopupMenuImpl::invalidateContentsForSlowScroll(const IntRect& updateRect)
 {
     invalidateContentsAndRootView(updateRect);
 }
 
 void WebPopupMenuImpl::scheduleAnimation()
 {
 }
 
-void WebPopupMenuImpl::scroll(const IntSize& scrollDelta, const IntRect& scrollRect, const IntRect& clipRect)
+void WebPopupMenuImpl::scroll(const IntRect& clipRect)
 {
-    if (m_client) {
-        int dx = scrollDelta.width();
-        int dy = scrollDelta.height();
-        m_client->didScrollRect(dx, dy, clipRect);
-    }
     if (m_rootLayer)
         m_rootLayer->layer()->invalidateRect(FloatRect(clipRect));
 }
 
 IntRect WebPopupMenuImpl::rootViewToScreen(const IntRect& rect) const
 {
     notImplemented();
     return IntRect();
 }
 
@@ skipping 10 matching lines @@
     ASSERT(widget == m_widget);
     if (m_widget) {
         m_widget->setClient(0);
         m_widget = 0;
     }
     if (m_client)
         m_client->closeWidgetSoon();
 }
 
 } // namespace blink