Remove GlyphBufferAdvance abstraction.

Source/platform/fonts/WidthIterator.cpp

 /*
  * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Holger Hans Peter Freyther
  *
  * 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,
@@ skipping 91 matching lines @@
 {
     ASSERT(typesettingFeatures & (Kerning | Ligatures));
 
     if (!glyphBuffer)
         return 0;
 
     unsigned glyphBufferSize = glyphBuffer->size();
     if (glyphBuffer->size() <= lastGlyphCount + 1)
         return 0;
 
-    GlyphBufferAdvance* advances = glyphBuffer->advances(0);
+    FloatSize* advances = glyphBuffer->advances(0);
     float widthDifference = 0;
     for (unsigned i = lastGlyphCount; i < glyphBufferSize; ++i)
         widthDifference -= advances[i].width();
 
     for (size_t i = 0; i < charactersTreatedAsSpace.size(); ++i) {
         int spaceOffset = charactersTreatedAsSpace[i].first;
         const OriginalAdvancesForCharacterTreatedAsSpace& originalAdvances = charactersTreatedAsSpace[i].second;
         if (spaceOffset && !originalAdvances.characterIsSpace)
             glyphBuffer->advances(spaceOffset - 1)->setWidth(originalAdvances.advanceBeforeCharacter);
         glyphBuffer->advances(spaceOffset)->setWidth(originalAdvances.advanceAtCharacter);
@@ skipping 208 matching lines @@
     unsigned oldSize = glyphBuffer.size();
     advance(m_currentCharacter + 1, &glyphBuffer);
     float w = 0;
     for (unsigned i = oldSize; i < glyphBuffer.size(); ++i)
         w += glyphBuffer.advanceAt(i).width();
     width = w;
     return glyphBuffer.size() > oldSize;
 }
 
 }