Explicitly set text direction for TextRuns

Source/core/rendering/RenderCombineText.h

 /*
  * Copyright (C) 2011 Apple 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 21 matching lines @@
 
     void combineText();
     void adjustTextOrigin(FloatPoint& textOrigin, const FloatRect& boxRect) const;
     void getStringToRender(int, StringView&, int& length) const;
     bool isCombined() const { return m_isCombined; }
     float combinedTextWidth(const Font& font) const { return font.size(); }
     const Font& originalFont() const { return parent()->style()->font(); }
 
 private:
     virtual bool isCombineText() const { return true; }
-    virtual float width(unsigned from, unsigned length, const Font&, float xPosition, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
+    virtual float width(unsigned from, unsigned length, const Font&, float xPosition, TextDirection, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
     virtual const char* renderName() const { return "RenderCombineText"; }
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     virtual void setTextInternal(PassRefPtr<StringImpl>);
 
     float m_combinedTextWidth;
     bool m_isCombined : 1;
     bool m_needsFontUpdate : 1;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderCombineText, isCombineText());
 
 } // namespace WebCore
 
 #endif // RenderCombineText_h