[New Multicolumn] Make offsetLeft, offsetTop and getClientRects() behave.

Source/core/rendering/RenderBlock.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. 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 163 matching lines @@
 
     LayoutRect logicalRectToPhysicalRect(const LayoutPoint& physicalPosition, const LayoutRect& logicalRect);
 
     // Helper methods for computing line counts and heights for line counts.
     RootInlineBox* lineAtIndex(int) const;
     int lineCount(const RootInlineBox* = 0, bool* = 0) const;
     int heightForLineCount(int);
     void clearTruncation();
 
     void adjustRectForColumns(LayoutRect&) const;
-    virtual LayoutSize columnOffset(const LayoutPoint&) const OVERRIDE FINAL;
+    virtual LayoutSize columnOffset(const LayoutPoint&) const OVERRIDE;
     void adjustForColumnRect(LayoutSize& offset, const LayoutPoint& locationInContainer) const;
 
     void addContinuationWithOutline(RenderInline*);
     bool paintsContinuationOutline(RenderInline*);
 
     virtual RenderBoxModelObject* virtualContinuation() const OVERRIDE FINAL { return continuation(); }
     bool isAnonymousBlockContinuation() const { return continuation() && isAnonymousBlock(); }
     RenderInline* inlineElementContinuation() const;
     RenderBlock* blockElementContinuation() const;
 
@@ skipping 353 matching lines @@
     // FIXME: This is temporary as we move code that accesses block flow
     // member variables out of RenderBlock and into RenderBlockFlow.
     friend class RenderBlockFlow;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBlock, isRenderBlock());
 
 } // namespace WebCore
 
 #endif // RenderBlock_h