Prepare to use invalidation set for adding/removing RuleSets.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 152 matching lines @@
 
     unsigned ruleCount() const { return m_ruleCount; }
 
     void compactRulesIfNeeded()
     {
         if (!m_pendingRules)
             return;
         compactRules();
     }
 
+    bool hasSlottedRules() const { return !m_slottedPseudoElementRules.isEmpty(); }
+
+    bool hasV0BoundaryCrossingRules() const
+    {
+        return !m_deepCombinatorOrShadowPseudoRules.isEmpty()
+            || !m_contentPseudoElementRules.isEmpty();
+    }
+
+    bool needsFullRecalcForRuleSetInvalidation() const
+    {
+        return m_features.needsFullRecalcForRuleSetInvalidation()
+            || hasV0BoundaryCrossingRules();
+    }
+
 #ifndef NDEBUG
     void show() const;
 #endif
 
     DECLARE_TRACE();
 
 private:
     using PendingRuleMap = HeapHashMap<AtomicString, Member<HeapLinkedStack<RuleData>>>;
     using CompactRuleMap = HeapHashMap<AtomicString, Member<HeapTerminatedArray<RuleData>>>;
 
@@ skipping 61 matching lines @@
     Member<PendingRuleMaps> m_pendingRules;
 
 #ifndef NDEBUG
     HeapVector<RuleData> m_allRules;
 #endif
 };
 
 } // namespace blink
 
 #endif // RuleSet_h