Update SVG text layout to use shaped glyph data & go fast (O(n^2)->O(n))

third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaper.h

 /*
  * Copyright (C) 2015 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 43 matching lines @@
         FloatRect* glyphBounds);
     int offsetForPosition(const Font*, const TextRun&, float targetX);
     float fillGlyphBuffer(const Font*, const TextRun&,
         HashSet<const SimpleFontData*>*, GlyphBuffer*,
         unsigned from, unsigned to);
     float fillGlyphBufferForTextEmphasis(const Font*, const TextRun&,
         const GlyphData* emphasisData, GlyphBuffer*,
         unsigned from, unsigned to);
     CharacterRange getCharacterRange(const Font*, const TextRun&,
         unsigned from, unsigned to);
+    Vector<CharacterRange> individualCharacterRanges(const Font*,
+        const TextRun&, unsigned from, unsigned to);
 
 private:
     ShapeCache* m_shapeCache;
 };
 
 } // namespace blink
 
 #endif // CachingWordShaper_h