SP: Optimize calculating cull rects for inline text and ellipsis boxes.

Source/core/layout/line/InlineBox.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 261 matching lines @@
         if (!layoutObject().isText())
             return toLayoutBoxModelObject(&layoutObject());
         return 0;
     }
 
     LayoutPoint locationIncludingFlipping();
 
     // Converts from a rect in the logical space of the InlineBox to one in the physical space
     // of the containing block. The logical space of an InlineBox may be transposed for vertical text and
     // flipped for right-to-left text.
-    LayoutRect logicalRectToPhysicalRect(const LayoutRect&);
+    void logicalRectToPhysicalRect(LayoutRect&);
 
     void flipForWritingMode(FloatRect&);
     FloatPoint flipForWritingMode(const FloatPoint&);
     void flipForWritingMode(LayoutRect&);
     LayoutPoint flipForWritingMode(const LayoutPoint&);
 
     bool knownToHaveNoOverflow() const { return m_bitfields.knownToHaveNoOverflow(); }
     void clearKnownToHaveNoOverflow();
 
     bool dirOverride() const { return m_bitfields.dirOverride(); }
@@ skipping 142 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineBox*);
 void showLineTree(const blink::InlineBox*);
 #endif
 
 #endif // InlineBox_h