Use a bitmask for SVG render object types

Source/core/rendering/svg/RenderSVGInlineText.h

Index: Source/core/rendering/svg/RenderSVGInlineText.h
diff --git a/Source/core/rendering/svg/RenderSVGInlineText.h b/Source/core/rendering/svg/RenderSVGInlineText.h
index 8c7f711a68fc40fca862c5104c193d3345c7f298..97e31d35655c4d6b70e94e7bfe2435e7c03a1c0d 100644
--- a/Source/core/rendering/svg/RenderSVGInlineText.h
+++ b/Source/core/rendering/svg/RenderSVGInlineText.h
@@ -46,14 +46,13 @@ public:
 
 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;