Remove unneeded const on updateOffsetIfNeeded method.

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 1175 matching lines @@
         // the outermost float on that line has a shape-outside, the inline
         // content that butts up against that float must be positioned using
         // the contours of the shape, not the margin box of the float.
         // We save the last float encountered so that the offset can be
         // computed correctly by the code using this adapter.
         const FloatingObject* lastFloat() const { return m_last; }
 
         LayoutUnit getHeightRemaining() const;
 
     private:
-        bool updateOffsetIfNeeded(const FloatingObject*) const;
+        bool updateOffsetIfNeeded(const FloatingObject*);
 
         const RenderBlock* m_renderer;
         int m_lowValue;
         int m_highValue;
         LayoutUnit& m_offset;
         const FloatingObject* m_last;
         const FloatingObject* m_floatForHeight;
     };
 
     void createFloatingObjects();
@@ skipping 132 matching lines @@
     static String string(const int value);
 };
 template<> struct ValueToString<RenderBlock::FloatingObject*> {
     static String string(const RenderBlock::FloatingObject*);
 };
 #endif
 
 } // namespace WebCore
 
 #endif // RenderBlock_h