Simplify GlyphBuffer::reverse.

Source/platform/fonts/GlyphBuffer.h

 /*
  * Copyright (C) 2006, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2008 Torch Mobile Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 61 matching lines @@
         add(glyph, font, FloatSize(width, 0));
     }
 
     void add(Glyph glyph, const SimpleFontData* font, const FloatSize& advance)
     {
         m_fontData.append(font);
         m_glyphs.append(glyph);
         m_advances.append(advance);
     }
 
-    void reverse(unsigned from, unsigned length)
+    void reverse()
     {
-        for (unsigned i = from, end = from + length - 1; i < end; ++i, --end)
-            swap(i, end);
+        m_fontData.reverse();
+        m_glyphs.reverse();
+        m_advances.reverse();
     }
 
     void expandLastAdvance(float width)
     {
         ASSERT(!isEmpty());
         FloatSize& lastAdvance = m_advances.last();
         lastAdvance.setWidth(lastAdvance.width() + width);
     }
 
 private:
-    void swap(unsigned index1, unsigned index2)
-    {
-        const SimpleFontData* f = m_fontData[index1];
-        m_fontData[index1] = m_fontData[index2];
-        m_fontData[index2] = f;
-
-        Glyph g = m_glyphs[index1];
-        m_glyphs[index1] = m_glyphs[index2];
-        m_glyphs[index2] = g;
-
-        FloatSize s = m_advances[index1];
-        m_advances[index1] = m_advances[index2];
-        m_advances[index2] = s;
-    }
-
     Vector<const SimpleFontData*, 2048> m_fontData;
     Vector<Glyph, 2048> m_glyphs;
     Vector<FloatSize, 2048> m_advances;
 };
 
 }
 #endif