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

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

Index: third_party/WebKit/Source/core/css/RuleSet.h
diff --git a/third_party/WebKit/Source/core/css/RuleSet.h b/third_party/WebKit/Source/core/css/RuleSet.h
index d0ff80e1df8ad795edd018eb9279b1d2a0773d7f..27390862226028bbf2ce0c3612d3c8350a28a380 100644
--- a/third_party/WebKit/Source/core/css/RuleSet.h
+++ b/third_party/WebKit/Source/core/css/RuleSet.h
@@ -146,6 +146,7 @@ public:
     const WillBeHeapVector<RawPtrWillBeMember<StyleRuleKeyframes>>& keyframesRules() const { return m_keyframesRules; }
     const WillBeHeapVector<MinimalRuleData>& deepCombinatorOrShadowPseudoRules() const { return m_deepCombinatorOrShadowPseudoRules; }
     const WillBeHeapVector<MinimalRuleData>& shadowDistributedRules() const { return m_shadowDistributedRules; }
+    const WillBeHeapVector<MinimalRuleData>& shadowSlottedRules() const { return m_shadowSlottedRules; }
     const MediaQueryResultList& viewportDependentMediaQueryResults() const { return m_viewportDependentMediaQueryResults; }
 
     unsigned ruleCount() const { return m_ruleCount; }
@@ -221,9 +222,8 @@ private:
     WillBeHeapVector<RawPtrWillBeMember<StyleRuleFontFace>> m_fontFaceRules;
     WillBeHeapVector<RawPtrWillBeMember<StyleRuleKeyframes>> m_keyframesRules;
     WillBeHeapVector<MinimalRuleData> m_deepCombinatorOrShadowPseudoRules;
-    // TODO(kochi): "shadowDistributed" means the selector has ::content pseudo element.
-    // Once ::slotted is introduced, come up with more readable name.
     WillBeHeapVector<MinimalRuleData> m_shadowDistributedRules;
+    WillBeHeapVector<MinimalRuleData> m_shadowSlottedRules;
 
     MediaQueryResultList m_viewportDependentMediaQueryResults;