Added some methods to abstract inline text boxes.

third_party/WebKit/Source/core/layout/line/AbstractInlineTextBox.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 61 matching lines @@
   enum Direction { kLeftToRight, kRightToLeft, kTopToBottom, kBottomToTop };
 
   ~AbstractInlineTextBox();
 
   LineLayoutText GetLineLayoutItem() const { return line_layout_item_; }
 
   PassRefPtr<AbstractInlineTextBox> NextInlineTextBox() const;
   LayoutRect LocalBounds() const;
   unsigned Len() const;
   Direction GetDirection() const;
+  Node* GetNode() const { return line_layout_item_.GetNode(); }
   void CharacterWidths(Vector<float>&) const;
   void GetWordBoundaries(Vector<WordBoundaries>&) const;
   String GetText() const;
   bool IsFirst() const;
   bool IsLast() const;
   PassRefPtr<AbstractInlineTextBox> NextOnLine() const;
   PassRefPtr<AbstractInlineTextBox> PreviousOnLine() const;
 
  private:
   void Detach();
 
   // Weak ptrs; these are nulled when InlineTextBox::destroy() calls
   // AbstractInlineTextBox::willDestroy.
   LineLayoutText line_layout_item_;
   InlineTextBox* inline_text_box_;
 
   typedef HashMap<InlineTextBox*, RefPtr<AbstractInlineTextBox>>
       InlineToAbstractInlineTextBoxHashMap;
   static InlineToAbstractInlineTextBoxHashMap* g_abstract_inline_text_box_map_;
 };
 
 }  // namespace blink
 
 #endif  // AbstractInlineTextBox_h