Prepare to use invalidation set for adding/removing RuleSets.

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

Index: third_party/WebKit/Source/core/css/RuleFeature.h
diff --git a/third_party/WebKit/Source/core/css/RuleFeature.h b/third_party/WebKit/Source/core/css/RuleFeature.h
index 56bb24bf31a0026a819ee8f6a8589cfa7e825036..bc87159b6975d8b289fcbe4460a4ea9e3f709960 100644
--- a/third_party/WebKit/Source/core/css/RuleFeature.h
+++ b/third_party/WebKit/Source/core/css/RuleFeature.h
@@ -75,6 +75,7 @@ public:
     bool usesSiblingRules() const { return !siblingRules.isEmpty(); }
     bool usesFirstLineRules() const { return m_metadata.usesFirstLineRules; }
     bool usesWindowInactiveSelector() const { return m_metadata.usesWindowInactiveSelector; }
+    bool needsFullRecalcForRuleSetInvalidation() const { return m_metadata.needsFullRecalcForRuleSetInvalidation; }
 
     unsigned maxDirectAdjacentSelectors() const { return m_metadata.maxDirectAdjacentSelectors; }
 
@@ -134,6 +135,7 @@ private:
         bool usesWindowInactiveSelector = false;
         bool foundSiblingSelector = false;
         bool foundInsertionPointCrossing = false;
+        bool needsFullRecalcForRuleSetInvalidation = false;
         unsigned maxDirectAdjacentSelectors = 0;
     };
 
@@ -168,6 +170,7 @@ private:
         bool contentPseudoCrossing = false;
         bool invalidatesSlotted = false;
         bool hasNthPseudo = false;
+        bool hasInvalidationSetFeaturesInScope = false;
     };
 
     static void extractInvalidationSetFeature(const CSSSelector&, InvalidationSetFeatures&);