Remove some dead scrolling paths and unused params

Source/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 475 matching lines @@
 void ChromeClientImpl::invalidateContentsForSlowScroll(const IntRect& updateRect)
 {
     invalidateContentsAndRootView(updateRect);
 }
 
 void ChromeClientImpl::scheduleAnimation()
 {
     m_webView->scheduleAnimation();
 }
 
-void ChromeClientImpl::scroll(
-    const IntSize& scrollDelta, const IntRect& scrollRect,
-    const IntRect& clipRect)
+void ChromeClientImpl::scroll()
 {
-    if (!m_webView->isAcceleratedCompositingActive()) {
-        if (m_webView->client()) {
-            int dx = scrollDelta.width();
-            int dy = scrollDelta.height();
-            m_webView->client()->didScrollRect(dx, dy, intersection(scrollRect, clipRect));
-        }
-    } else {
-        m_webView->scrollRootLayer();
-    }
+    ASSERT(m_webView->isAcceleratedCompositingActive());
+    m_webView->scrollRootLayer();
 }
 
 IntRect ChromeClientImpl::rootViewToScreen(const IntRect& rect) const
 {
     IntRect screenRect(rect);
 
     if (m_webView->client()) {
         WebRect windowRect = m_webView->client()->windowRect();
         screenRect.move(windowRect.x, windowRect.y);
     }
@@ skipping 368 matching lines @@
     if (m_webView->autofillClient())
         m_webView->autofillClient()->openTextDataListChooser(WebInputElement(&input));
 }
 
 bool ChromeClientImpl::usesGpuRasterization()
 {
     return m_webView->layerTreeView()->usesGpuRasterization();
 }
 
 } // namespace blink