Make siblingRules and uncommonAttributeRules private.

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 2f4e20e0302a43f97a9934d7a7cb76738e6e6a21..3f3f1592fb225b4a894a81eae2442d646080aafe 100644
--- a/third_party/WebKit/Source/core/css/RuleFeature.h
+++ b/third_party/WebKit/Source/core/css/RuleFeature.h
@@ -76,7 +76,7 @@ class CORE_EXPORT RuleFeatureSet {
 
   SelectorPreMatch collectFeaturesFromRuleData(const RuleData&);
 
-  bool usesSiblingRules() const { return !siblingRules.isEmpty(); }
+  bool usesSiblingRules() const { return !m_siblingRules.isEmpty(); }
   bool usesFirstLineRules() const { return m_metadata.usesFirstLineRules; }
   bool usesWindowInactiveSelector() const {
     return m_metadata.usesWindowInactiveSelector;
@@ -103,6 +103,11 @@ class CORE_EXPORT RuleFeatureSet {
     return m_idInvalidationSets.contains(idValue);
   }
 
+  const HeapVector<RuleFeature>& siblingRules() const { return m_siblingRules; }
+  const HeapVector<RuleFeature>& uncommonAttributeRules() const {
+    return m_uncommonAttributeRules;
+  }
+
   // Collect descendant and sibling invalidation sets.
   void collectInvalidationSetsForClass(InvalidationLists&,
                                        Element&,
@@ -139,9 +144,6 @@ class CORE_EXPORT RuleFeatureSet {
 
   DECLARE_TRACE();
 
-  HeapVector<RuleFeature> siblingRules;
-  HeapVector<RuleFeature> uncommonAttributeRules;
-
   bool isAlive() const { return m_isAlive; }
 
  protected:
@@ -273,6 +275,8 @@ class CORE_EXPORT RuleFeatureSet {
   PseudoTypeInvalidationSetMap m_pseudoInvalidationSets;
   RefPtr<SiblingInvalidationSet> m_universalSiblingInvalidationSet;
   RefPtr<DescendantInvalidationSet> m_nthInvalidationSet;
+  HeapVector<RuleFeature> m_siblingRules;
+  HeapVector<RuleFeature> m_uncommonAttributeRules;
 
   // If true, the RuleFeatureSet is alive and can be used.
   unsigned m_isAlive : 1;