[Line Layout API] Convert AbstractInlineTextBox to new line layout API

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

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2009, 2010, 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.
  *
@@ skipping 33 matching lines @@
         : InlineBox(obj)
         , m_prevTextBox(nullptr)
         , m_nextTextBox(nullptr)
         , m_start(start)
         , m_len(length)
         , m_truncation(cNoTruncation)
     {
         setIsText(true);
     }
 
-    LayoutText& layoutObject() const { return toLayoutText(InlineBox::layoutObject()); }
     LineLayoutText lineLayoutItem() const { return LineLayoutText(InlineBox::lineLayoutItem()); }
 
     void destroy() final;
 
     InlineTextBox* prevTextBox() const { return m_prevTextBox; }
     InlineTextBox* nextTextBox() const { return m_nextTextBox; }
     void setNextTextBox(InlineTextBox* n) { m_nextTextBox = n; }
     void setPreviousTextBox(InlineTextBox* p) { m_prevTextBox = p; }
 
     // FIXME: These accessors should ASSERT(!isDirty()). See https://bugs.webkit.org/show_bug.cgi?id=97264
@@ skipping 117 matching lines @@
     }
 };
 
 DEFINE_INLINE_BOX_TYPE_CASTS(InlineTextBox);
 
 void alignSelectionRectToDevicePixels(LayoutRect&);
 
 } // namespace blink
 
 #endif // InlineTextBox_h