Add RenderText DirectionalityMode enum and support; etc.

ui/gfx/render_text_linux.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_RENDER_TEXT_LINUX_H_
 #define UI_GFX_RENDER_TEXT_LINUX_H_
 
 #include <pango/pango.h>
 #include <vector>
 
 #include "ui/gfx/render_text.h"
 
 namespace gfx {
 
 // RenderTextLinux is the Linux implementation of RenderText using Pango.
 class RenderTextLinux : public RenderText {
  public:
   RenderTextLinux();
   virtual ~RenderTextLinux();
 
   // Overridden from RenderText:
-  virtual base::i18n::TextDirection GetTextDirection() OVERRIDE;
   virtual Size GetStringSize() OVERRIDE;
   virtual int GetBaseline() OVERRIDE;
   virtual SelectionModel FindCursorPosition(const Point& point) OVERRIDE;
   virtual std::vector<FontSpan> GetFontSpansForTesting() OVERRIDE;
 
  protected:
   // Overridden from RenderText:
   virtual SelectionModel AdjacentCharSelectionModel(
       const SelectionModel& selection,
       VisualCursorDirection direction) OVERRIDE;
@@ skipping 58 matching lines @@
   const char* layout_text_;
   // The text length.
   size_t layout_text_len_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderTextLinux);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_LINUX_H_