Convert first letter into a pseudo element.

Source/core/dom/Node.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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
@@ skipping 216 matching lines @@
 
     bool isElementNode() const { return getFlag(IsElementFlag); }
     bool isContainerNode() const { return getFlag(IsContainerFlag); }
     bool isTextNode() const { return getFlag(IsTextFlag); }
     bool isHTMLElement() const { return getFlag(IsHTMLFlag); }
     bool isSVGElement() const { return getFlag(IsSVGFlag); }
 
     bool isPseudoElement() const { return pseudoId() != NOPSEUDO; }
     bool isBeforePseudoElement() const { return pseudoId() == BEFORE; }
     bool isAfterPseudoElement() const { return pseudoId() == AFTER; }
+    bool isFirstLetterPseudoElement() const { return pseudoId() == FIRST_LETTER; }
     virtual PseudoId pseudoId() const { return NOPSEUDO; }
 
     bool isCustomElement() const { return getFlag(CustomElementFlag); }
     enum CustomElementState {
         NotCustomElement  = 0,
         WaitingForUpgrade = 1 << 0,
         Upgraded          = 1 << 1
     };
     CustomElementState customElementState() const
     {
@@ skipping 646 matching lines @@
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif // Node_h