Move element flags from ElementRareData to NodeRareData

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 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
@@ skipping 76 matching lines @@
     ChildrenAffectedByHover = 1 << 8,
     ChildrenAffectedByActive = 1 << 9,
     ChildrenAffectedByDrag = 1 << 10,
     ChildrenAffectedByFirstChildRules = 1 << 11,
     ChildrenAffectedByLastChildRules = 1 << 12,
     ChildrenAffectedByDirectAdjacentRules = 1 << 13,
     ChildrenAffectedByIndirectAdjacentRules = 1 << 14,
     ChildrenAffectedByForwardPositionalRules = 1 << 15,
     ChildrenAffectedByBackwardPositionalRules = 1 << 16,
 
+    NumberOfElementFlags = 17, // Required size of bitfield used to store the flags.
+
     // If any of these flags are set we cannot share style.
     ElementFlagsPreventingStyleSharing =
         ChildrenAffectedByFocus
         | ChildrenAffectedByHover
         | ChildrenAffectedByActive
         | ChildrenAffectedByDrag
         | ChildrenAffectedByFirstChildRules
         | ChildrenAffectedByLastChildRules
         | ChildrenAffectedByDirectAdjacentRules
         | ChildrenAffectedByIndirectAdjacentRules
@@ skipping 829 matching lines @@
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return element.predicate; } \
     DEFINE_NODE_TYPE_CASTS(thisType, predicate)
 
 #define DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType) \
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return is##thisType(element); } \
     DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 } // namespace
 
 #endif