Remove GlyphBufferAdvance abstraction.

Source/platform/fonts/harfbuzz/HarfBuzzShaper.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 120 matching lines @@
     void setFontFeatures();
 
     bool createHarfBuzzRuns();
     bool shapeHarfBuzzRuns();
     bool fillGlyphBuffer(GlyphBuffer*);
     void fillGlyphBufferFromHarfBuzzRun(GlyphBuffer*, HarfBuzzRun*, FloatPoint& firstOffsetOfNextRun);
     void fillGlyphBufferForTextEmphasis(GlyphBuffer*, HarfBuzzRun* currentRun);
     void setGlyphPositionsForHarfBuzzRun(HarfBuzzRun*, hb_buffer_t*);
     void addHarfBuzzRun(unsigned startCharacter, unsigned endCharacter, const SimpleFontData*, UScriptCode);
 
-    GlyphBufferAdvance createGlyphBufferAdvance(float, float);
-
     const Font* m_font;
     OwnPtr<UChar[]> m_normalizedBuffer;
     unsigned m_normalizedBufferLength;
     const TextRun& m_run;
 
     float m_wordSpacingAdjustment; // Delta adjustment (pixels) for each word break.
     float m_padding; // Pixels to be distributed over the line at word breaks.
     float m_padPerWordBreak; // Pixels to be added to each word break.
     float m_padError; // m_padPerWordBreak might have a fractional component. Since we only add a whole number of padding pixels at each word break we accumulate error. This is the number of pixels that we are behind so far.
     float m_letterSpacing; // Pixels to be added after each glyph.
@@ skipping 10 matching lines @@
 
     float m_totalWidth;
     FloatBoxExtent m_glyphBoundingBox;
 
     friend struct CachedShapingResults;
 };
 
 } // namespace WebCore
 
 #endif // HarfBuzzShaper_h