Add support for new CSS ::slotted() pseudo element

third_party/WebKit/Source/core/css/CSSSelector.h

Index: third_party/WebKit/Source/core/css/CSSSelector.h
diff --git a/third_party/WebKit/Source/core/css/CSSSelector.h b/third_party/WebKit/Source/core/css/CSSSelector.h
index 6982381afae2f0cd5d09d02e2dc487dadb470917..83c6119d558c92c94b83f025321973ec7a3ef0ec 100644
--- a/third_party/WebKit/Source/core/css/CSSSelector.h
+++ b/third_party/WebKit/Source/core/css/CSSSelector.h
@@ -117,7 +117,8 @@ public:
         DirectAdjacent, // + combinator
         IndirectAdjacent, // ~ combinator
         ShadowPseudo, // Special case of shadow DOM pseudo elements / shadow pseudo element
-        ShadowDeep // /deep/ combinator
+        ShadowDeep, // /deep/ combinator
+        ShadowSlot // slotted to <slot> element
     };
 
     enum PseudoType {
@@ -201,7 +202,8 @@ public:
         PseudoHostContext,
         PseudoShadow,
         PseudoSpatialNavigationFocus,
-        PseudoListBox
+        PseudoListBox,
+        PseudoSlotted
     };
 
     enum AttributeMatchType {
@@ -255,6 +257,7 @@ public:
     bool isAttributeSelector() const { return m_match >= FirstAttributeSelectorMatch; }
     bool isHostPseudoClass() const { return m_pseudoType == PseudoHost || m_pseudoType == PseudoHostContext; }
     bool isInsertionPointCrossing() const { return m_pseudoType == PseudoHostContext || m_pseudoType == PseudoContent; }
+    bool isSlottedPseudoElement() const { return m_pseudoType == PseudoSlotted; }
 
     Relation relation() const { return static_cast<Relation>(m_relation); }
     void setRelation(Relation relation)
@@ -287,6 +290,9 @@ public:
     bool relationIsAffectedByPseudoContent() const { return m_relationIsAffectedByPseudoContent; }
     void setRelationIsAffectedByPseudoContent() { m_relationIsAffectedByPseudoContent = true; }
 
+    bool relationIsAffectedByPseudoSlotted() const { return m_relationIsAffectedByPseudoSlotted; }
+    void setRelationIsAffectedByPseudoSlotted() { m_relationIsAffectedByPseudoSlotted = true; }
+
 private:
     unsigned m_relation               : 3; // enum Relation
     unsigned m_match                  : 4; // enum Match
@@ -296,7 +302,8 @@ private:
     unsigned m_hasRareData            : 1;
     unsigned m_isForPage              : 1;
     unsigned m_tagIsImplicit          : 1;
-    unsigned m_relationIsAffectedByPseudoContent  : 1;
+    unsigned m_relationIsAffectedByPseudoContent : 1;
+    unsigned m_relationIsAffectedByPseudoSlotted : 1;
 
     void setPseudoType(PseudoType pseudoType)
     {
@@ -416,6 +423,7 @@ inline CSSSelector::CSSSelector()
     , m_isForPage(false)
     , m_tagIsImplicit(false)
     , m_relationIsAffectedByPseudoContent(false)
+    , m_relationIsAffectedByPseudoSlotted(false)
 {
 }
 
@@ -429,6 +437,7 @@ inline CSSSelector::CSSSelector(const QualifiedName& tagQName, bool tagIsImplici
     , m_isForPage(false)
     , m_tagIsImplicit(tagIsImplicit)
     , m_relationIsAffectedByPseudoContent(false)
+    , m_relationIsAffectedByPseudoSlotted(false)
 {
     m_data.m_tagQName = tagQName.impl();
     m_data.m_tagQName->ref();
@@ -444,6 +453,7 @@ inline CSSSelector::CSSSelector(const CSSSelector& o)
     , m_isForPage(o.m_isForPage)
     , m_tagIsImplicit(o.m_tagIsImplicit)
     , m_relationIsAffectedByPseudoContent(o.m_relationIsAffectedByPseudoContent)
+    , m_relationIsAffectedByPseudoSlotted(o.m_relationIsAffectedByPseudoSlotted)
 {
     if (o.m_match == Tag) {
         m_data.m_tagQName = o.m_data.m_tagQName;