Make most{Backward,Forward}CaretPosition() to handle first-letter pseudo element

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 26 matching lines @@
 public:
     LayoutTextFragment(Node*, StringImpl*, int startOffset, int length);
     LayoutTextFragment(Node*, StringImpl*);
     ~LayoutTextFragment() override;
 
     bool isTextFragment() const override { return true; }
 
     bool canBeSelectionLeaf() const override { return node() && node()->hasEditableStyle(); }
 
     unsigned start() const { return m_start; }
+    unsigned fragmentLength() const { return m_fragmentLength; }
 
     unsigned textStartOffset() const override { return start(); }
 
     void setContentString(StringImpl*);
     StringImpl* contentString() const { return m_contentString.get(); }
     // The complete text is all of the text in the associated DOM text node.
     PassRefPtr<StringImpl> completeText() const;
     // The fragment text is the text which will be used by this LayoutTextFragment. For
     // things like first-letter this may differ from the completeText as we maybe using
     // only a portion of the text nodes content.
@@ skipping 16 matching lines @@
 
 protected:
     void willBeDestroyed() override;
 
 private:
     LayoutBlock* blockForAccompanyingFirstLetter() const;
     UChar previousCharacter() const override;
 
     Text* associatedTextNode() const;
     void updateHitTestResult(HitTestResult&, const LayoutPoint&) override;
-    unsigned fragmentLength() const { return m_fragmentLength; }
 
     unsigned m_start;
     unsigned m_fragmentLength;
     bool m_isRemainingTextLayoutObject;
     RefPtr<StringImpl> m_contentString;
     // Reference back to FirstLetterPseudoElement; cleared by FirstLetterPseudoElement::detach() if
     // it goes away first.
     GC_PLUGIN_IGNORE("http://crbug.com/509911")
     FirstLetterPseudoElement* m_firstLetterPseudoElement;
 };
 
 DEFINE_TYPE_CASTS(LayoutTextFragment, LayoutObject, object, toLayoutText(object)->isTextFragment(), toLayoutText(object).isTextFragment());
 
 } // namespace blink
 
 #endif // LayoutTextFragment_h