Support style invalidation for ::content.

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 279 matching lines @@
         bool matchesPseudoElement() const;
         bool isCustomPseudoElement() const;
         bool isDirectAdjacentSelector() const { return m_relation == DirectAdjacent; }
         bool isAdjacentSelector() const { return m_relation == DirectAdjacent || m_relation == IndirectAdjacent; }
         bool isShadowSelector() const { return m_relation == ShadowPseudo || m_relation == ShadowDeep; }
         bool isSiblingSelector() const;
         bool isAttributeSelector() const;
         bool isContentPseudoElement() const;
         bool isShadowPseudoElement() const;
         bool isHostPseudoClass() const;
-
+        bool isTreeBoundaryCrossing() const;
+        bool isInsertionPointCrossing() const;
         // FIXME: selectors with no tagHistory() get a relation() of Descendant (and sometimes even SubSelector). It should instead be
         // None.
         Relation relation() const { return static_cast<Relation>(m_relation); }
         void setRelation(Relation relation)
         {
             m_relation = relation;
             ASSERT(static_cast<Relation>(m_relation) == relation); // using a bitfield.
         }
 
         Match match() const { return static_cast<Match>(m_match); }
@@ skipping 129 matching lines @@
 inline bool CSSSelector::isContentPseudoElement() const
 {
     return m_match == PseudoElement && pseudoType() == PseudoContent;
 }
 
 inline bool CSSSelector::isShadowPseudoElement() const
 {
     return m_match == PseudoElement && pseudoType() == PseudoShadow;
 }
 
+inline bool CSSSelector::isTreeBoundaryCrossing() const
+{
+    return m_match == PseudoClass && (pseudoType() == PseudoHost || pseudoType() == PseudoHostContext);
+}
+
+inline bool CSSSelector::isInsertionPointCrossing() const
+{
+    return (m_match == PseudoClass && pseudoType() == PseudoHostContext)
+        || (m_match == PseudoElement && pseudoType() == PseudoContent);
+}
+
 inline void CSSSelector::setValue(const AtomicString& value)
 {
     ASSERT(m_match != Tag);
     ASSERT(m_pseudoType == PseudoNotParsed);
     // Need to do ref counting manually for the union.
     if (m_hasRareData) {
         m_data.m_rareData->m_value = value;
         return;
     }
     if (m_data.m_value)
@@ skipping 78 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 blink
 
 #endif // CSSSelector_h