Add a first pass of a class descendant invalidator, and a containing RuleSetAnalyzer

Source/core/css/RuleFeature.h

Index: Source/core/css/RuleFeature.h
diff --git a/Source/core/css/RuleFeature.h b/Source/core/css/RuleFeature.h
index b51863c428975a72a41f1295c091d558f12976a3..211ee143f16f6cc26cb51f539054c025c47708d1 100644
--- a/Source/core/css/RuleFeature.h
+++ b/Source/core/css/RuleFeature.h
@@ -22,6 +22,7 @@
 #ifndef RuleFeature_h
 #define RuleFeature_h
 
+#include "core/css/analyzer/RuleSetAnalyzer.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/AtomicStringHash.h"
@@ -80,12 +81,18 @@ public:
         return idsInRules.contains(idValue);
     }
 
+    const RuleSetAnalyzer* getRuleSetAnalyzer() const;

[esprehn, 2014/01/14 21:32:56]

ruleSetAnalyzer(), no get prefix.

+    RuleSetAnalyzer* ensureRuleSetAnalyzer();
+
+    // FIXME: move this stuff into the rule set analyzer.
     HashSet<AtomicString> idsInRules;
     HashSet<AtomicString> classesInRules;
     HashSet<AtomicString> attrsInRules;
     Vector<RuleFeature> siblingRules;
     Vector<RuleFeature> uncommonAttributeRules;
 private:
+    RefPtr<RuleSetAnalyzer> ruleSetAnalyzer;
+
     void collectFeaturesFromSelectorList(const CSSSelectorList*);
 
     bool m_usesFirstLineRules;