Rename ^ and ^^ combinator to /shadow-all/ and /shadow-deep/.

Source/core/css/CSSSelector.h

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2013 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 111 matching lines @@
             PagePseudoClass // ??
         };
 
         enum Relation {
             Descendant = 0, // "Space" combinator
             Child, // > combinator
             DirectAdjacent, // + combinator
             IndirectAdjacent, // ~ combinator
             SubSelector, // "No space" combinator
             ShadowPseudo, // Special case of shadow DOM pseudo elements
-            // FIXME: rename ChildTree and DescendantTree when the spec for this is written down.
-            ChildTree, // ^ operator for shadow DOM
-            DescendantTree // ^^ operator for shadow DOM
+            // FIXME: implement named combinator and replace the following /shadow/, /shadow-all/ and
+            // /shadow-deep/ with named combinator's implementation.
+            ShadowAll,
+            ShadowDeep
         };
 
         enum PseudoType {
             PseudoNotParsed = 0,
             PseudoUnknown,
             PseudoEmpty,
             PseudoFirstChild,
             PseudoFirstOfType,
             PseudoLastChild,
             PseudoLastOfType,
@@ skipping 369 matching lines @@
     if (m_hasRareData)
         return m_data.m_rareData->m_value;
     // AtomicString is really just a StringImpl* so the cast below is safe.
     // FIXME: Perhaps call sites could be changed to accept StringImpl?
     return *reinterpret_cast<const AtomicString*>(&m_data.m_value);
 }
 
 } // namespace WebCore
 
 #endif // CSSSelector_h