Remove some dead scrolling paths and unused params

Source/core/page/Chrome.cpp

 /*
  * Copyright (C) 2006, 2007, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2012, Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 55 matching lines @@
 void Chrome::invalidateContentsAndRootView(const IntRect& updateRect)
 {
     m_client->invalidateContentsAndRootView(updateRect);
 }
 
 void Chrome::invalidateContentsForSlowScroll(const IntRect& updateRect)
 {
     m_client->invalidateContentsForSlowScroll(updateRect);
 }
 
-void Chrome::scroll(const IntSize& scrollDelta, const IntRect& rectToScroll, const IntRect& clipRect)
+void Chrome::scroll(const IntRect& unusedClipRect)
 {
-    m_client->scroll(scrollDelta, rectToScroll, clipRect);
+    m_client->scroll();
     InspectorInstrumentation::didScroll(m_page);
 }
 
 IntRect Chrome::rootViewToScreen(const IntRect& rect) const
 {
     return m_client->rootViewToScreen(rect);
 }
 
 blink::WebScreenInfo Chrome::screenInfo() const
 {
@@ skipping 318 matching lines @@
     for (size_t i = 0; i < observers.size(); ++i)
         observers[i]->willOpenPopup();
 }
 
 void Chrome::willBeDestroyed()
 {
     m_client->chromeDestroyed();
 }
 
 } // namespace WebCore