Use a bitmask for SVG render object types

Source/core/rendering/svg/RenderSVGInlineText.h

 /*
  * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Rob Buis <buis@kde.org>
  *
  * 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 28 matching lines @@
     float scalingFactor() const { return m_scalingFactor; }
     const Font& scaledFont() const { return m_scaledFont; }
     void updateScaledFont();
     static void computeNewScaledFontForStyle(RenderObject*, const RenderStyle*, float& scalingFactor, Font& scaledFont);
 
     // Preserves floating point precision for the use in DRT. It knows how to round and does a better job than enclosingIntRect.
     FloatRect floatLinesBoundingBox() const;
 
 private:
     virtual const char* renderName() const { return "RenderSVGInlineText"; }
+    virtual SVGType getSVGType() const OVERRIDE { return IsSVGInlineText; }
 
     virtual void setTextInternal(PassRefPtr<StringImpl>);
     virtual void styleDidChange(StyleDifference, const RenderStyle*);
 
     virtual FloatRect objectBoundingBox() const { return floatLinesBoundingBox(); }
 
-    virtual bool isSVGInlineText() const { return true; }
-
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE FINAL;
     virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0);
     virtual IntRect linesBoundingBox() const;
     virtual InlineTextBox* createTextBox();
 
     float m_scalingFactor;
     Font m_scaledFont;
     SVGTextLayoutAttributes m_layoutAttributes;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGInlineText, isSVGInlineText());
 
 }
 
 #endif // RenderSVGInlineText_h