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

Source/core/dom/shadow/SelectRuleFeatureSet.h

Index: Source/core/dom/shadow/SelectRuleFeatureSet.h
diff --git a/Source/core/dom/shadow/SelectRuleFeatureSet.h b/Source/core/dom/shadow/SelectRuleFeatureSet.h
index 429d2777699c1c3b5d92eeebadd456f3dc911a89..f0a83cbac40ea2f78c7de22f109f7ed367989c97 100644
--- a/Source/core/dom/shadow/SelectRuleFeatureSet.h
+++ b/Source/core/dom/shadow/SelectRuleFeatureSet.h
@@ -48,6 +48,8 @@ public:
     bool hasSelectorForClass(const AtomicString&) const;
     bool hasSelectorForAttribute(const AtomicString&) const;
 
+    const RuleSetAnalyzer* getRuleSetAnalyzer() const;
+
     bool hasSelectorForChecked() const { return hasSelectorFor(AffectedSelectorChecked); }
     bool hasSelectorForEnabled() const { return hasSelectorFor(AffectedSelectorEnabled); }
     bool hasSelectorForDisabled() const { return hasSelectorFor(AffectedSelectorDisabled); }
@@ -65,6 +67,11 @@ private:
     int m_featureFlags;
 };
 
+inline const RuleSetAnalyzer* SelectRuleFeatureSet::getRuleSetAnalyzer() const

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

Poor shadow DOM, add a FIXME to make ShadowDOM smarter someday.

[chrishtr, 2014/01/14 23:33:00]

Done.

+{
+    return 0;
+}
+
 inline bool SelectRuleFeatureSet::hasSelectorForId(const AtomicString& idValue) const
 {
     ASSERT(!idValue.isEmpty());