Drop InvalidationSetMode.

Source/core/css/CSSSelector.h

Index: Source/core/css/CSSSelector.h
diff --git a/Source/core/css/CSSSelector.h b/Source/core/css/CSSSelector.h
index 563e371b27be5d4127c9cc10a76fed257fce96f7..9118960cdb608a211cacdad7d94b7b58400fa570 100644
--- a/Source/core/css/CSSSelector.h
+++ b/Source/core/css/CSSSelector.h
@@ -290,12 +290,15 @@ namespace blink {
         bool matchesPseudoElement() const;
         bool isCustomPseudoElement() const;
         bool isDirectAdjacentSelector() const { return m_relation == DirectAdjacent; }
+        bool isAdjacentSelector() const { return m_relation == DirectAdjacent || m_relation == IndirectAdjacent; }
         bool isSiblingSelector() const;
         bool isAttributeSelector() const;
         bool isContentPseudoElement() const;
         bool isShadowPseudoElement() const;
         bool isHostPseudoClass() const;
-
+        bool isShadowSelector() const { return m_relation == ShadowPseudo || m_relation == ShadowDeep; }
+        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); }
@@ -445,6 +448,17 @@ 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);