Missing clear() for pseudo invalidation sets.

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

Index: third_party/WebKit/Source/core/css/RuleFeature.cpp
diff --git a/third_party/WebKit/Source/core/css/RuleFeature.cpp b/third_party/WebKit/Source/core/css/RuleFeature.cpp
index f89de00af3ef780abe8d90b3ac724873fc0d88cc..63b99e91a77505d8045144cd8b71397c2ccde742 100644
--- a/third_party/WebKit/Source/core/css/RuleFeature.cpp
+++ b/third_party/WebKit/Source/core/css/RuleFeature.cpp
@@ -547,6 +547,7 @@ void RuleFeatureSet::clear()
     m_classInvalidationSets.clear();
     m_attributeInvalidationSets.clear();
     m_idInvalidationSets.clear();
+    m_pseudoInvalidationSets.clear();
 }
 
 void RuleFeatureSet::collectInvalidationSetsForClass(InvalidationSetVector& invalidationSets, Element& element, const AtomicString& className) const