Add full offset mapping construction in a block

third_party/WebKit/Source/core/layout/LayoutTextFragment.h

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 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 74 matching lines @@
     return first_letter_pseudo_element_;
   }
 
   void SetIsRemainingTextLayoutObject(bool is_remaining_text) {
     is_remaining_text_layout_object_ = is_remaining_text;
   }
   bool IsRemainingTextLayoutObject() const {
     return is_remaining_text_layout_object_;
   }
 
+  Text* AssociatedTextNode() const;
+
  protected:
   void WillBeDestroyed() override;
 
  private:
   LayoutBlock* BlockForAccompanyingFirstLetter() const;
   UChar PreviousCharacter() const override;
 
-  Text* AssociatedTextNode() const;
   void UpdateHitTestResult(HitTestResult&, const LayoutPoint&) override;
 
   unsigned start_;
   unsigned fragment_length_;
   bool is_remaining_text_layout_object_;
   RefPtr<StringImpl> content_string_;
   // Reference back to FirstLetterPseudoElement; cleared by
   // FirstLetterPseudoElement::detachLayoutTree() if it goes away first.
   UntracedMember<FirstLetterPseudoElement> first_letter_pseudo_element_;
 };
 
 DEFINE_TYPE_CASTS(LayoutTextFragment,
                   LayoutObject,
                   object,
                   ToLayoutText(object)->IsTextFragment(),
                   ToLayoutText(object).IsTextFragment());
 
 }  // namespace blink
 
 #endif  // LayoutTextFragment_h