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

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

 /*
  * Copyright (C) 2003, 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Holger Hans Peter Freyther
  * Copyright (C) 2014 Google 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.
  *
@@ skipping 22 matching lines @@
 
 namespace blink {
 
 class Font;
 class GlyphBuffer;
 class SimpleFontData;
 class TextRun;
 struct GlyphData;
 
 struct PLATFORM_EXPORT SimpleShaper : public Shaper {
-    // SVGTextMetricsCalculator wants to allocate SimpleShaper by using
-    // operator new.
-    USING_FAST_MALLOC(SimpleShaper);
 public:
     SimpleShaper(const Font*, const TextRun&, const GlyphData* emphasisData = nullptr,
         HashSet<const SimpleFontData*>* fallbackFonts = nullptr, FloatRect* = nullptr);
 
     // TODO(sk.kumar): This function should be updated to take an unsigned value, and callers
     // should be updated to not pass negative values. See: crbug.com/540047.
     unsigned advance(int to, GlyphBuffer* = 0);
     bool advanceOneCharacter(float& width);
 
     const TextRun& run() const { return m_textRun; }
@@ skipping 15 matching lines @@
     float characterWidth(UChar32, const GlyphData&) const;
     float adjustSpacing(float, const CharacterData&);
 
     template <typename TextIterator>
     unsigned advanceInternal(TextIterator&, GlyphBuffer*);
 };
 
 } // namespace blink
 
 #endif