Implement CSS parser part for ::slotted pseudo element

third_party/WebKit/Source/core/css/CSSSelectorList.cpp

 /*
  * Copyright (C) 2008, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 143 matching lines @@
 bool CSSSelectorList::selectorsNeedNamespaceResolution()
 {
     return forEachSelector([](const CSSSelector& selector) -> bool {
         if (selector.match() != CSSSelector::Tag && !selector.isAttributeSelector())
             return false;
         const AtomicString& prefix = selector.isAttributeSelector() ? selector.attribute().prefix() : selector.tagQName().prefix();
         return prefix != nullAtom && prefix != emptyAtom && prefix != starAtom;
     }, this);
 }
 
-bool CSSSelectorList::selectorHasShadowDistributed(size_t index) const
+bool CSSSelectorList::selectorHasContentPseudo(size_t index) const
 {
     return forEachTagSelector([](const CSSSelector& selector) -> bool {
         return selector.relationIsAffectedByPseudoContent();
     }, selectorAt(index));
 }
 
+bool CSSSelectorList::selectorHasSlottedPseudo(size_t index) const
+{
+    return forEachTagSelector([](const CSSSelector& selector) ->  bool {
+        return selector.pseudoType() == CSSSelector::PseudoSlotted;
+    }, selectorAt(index));
+}
+
 bool CSSSelectorList::selectorUsesDeepCombinatorOrShadowPseudo(size_t index) const
 {
     return forEachTagSelector([](const CSSSelector& selector) -> bool {
         return selector.relation() == CSSSelector::ShadowDeep || selector.pseudoType() == CSSSelector::PseudoShadow;
     }, selectorAt(index));
 }
 
 bool CSSSelectorList::selectorNeedsUpdatedDistribution(size_t index) const
 {
     return forEachTagSelector([](const CSSSelector& selector) -> bool {
         return selector.relationIsAffectedByPseudoContent() || selector.pseudoType() == CSSSelector::PseudoHostContext;
     }, selectorAt(index));
 }
 
 } // namespace blink