Don't add rule features across ::content.

third_party/WebKit/Source/core/css/RuleFeature.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 120 matching lines @@
     InvalidationSet& ensureClassInvalidationSet(const AtomicString& className, InvalidationType type) { return ensureClassInvalidationData(className).ensureInvalidationSet(type); }
     InvalidationSet& ensureAttributeInvalidationSet(const AtomicString& attributeName, InvalidationType type) { return ensureAttributeInvalidationData(attributeName).ensureInvalidationSet(type); }
     InvalidationSet& ensureIdInvalidationSet(const AtomicString& id, InvalidationType type) { return ensureIdInvalidationData(id).ensureInvalidationSet(type); }
     InvalidationSet& ensurePseudoInvalidationSet(CSSSelector::PseudoType pseudoType, InvalidationType type) { return ensurePseudoInvalidationData(pseudoType).ensureInvalidationSet(type); }
 
     void updateInvalidationSets(const RuleData&);
     void updateInvalidationSetsForContentAttribute(const RuleData&);
 
     struct InvalidationSetFeatures {
         DISALLOW_NEW();
-        InvalidationSetFeatures()
-            : maxDirectAdjacentSelectors(UINT_MAX)
-            , customPseudoElement(false)
-            , hasBeforeOrAfter(false)
-            , treeBoundaryCrossing(false)
-            , adjacent(false)
-            , insertionPointCrossing(false)
-            , forceSubtree(false)
-        { }
 
         Vector<AtomicString> classes;
         Vector<AtomicString> attributes;
         AtomicString id;
         AtomicString tagName;
-        unsigned maxDirectAdjacentSelectors;
-        bool customPseudoElement;
-        bool hasBeforeOrAfter;
-        bool treeBoundaryCrossing;
-        bool adjacent;
-        bool insertionPointCrossing;
-        bool forceSubtree;
+        unsigned maxDirectAdjacentSelectors = UINT_MAX;
+        bool customPseudoElement = false;
+        bool hasBeforeOrAfter = false;
+        bool treeBoundaryCrossing = false;
+        bool adjacent = false;
+        bool insertionPointCrossing = false;
+        bool forceSubtree = false;
+        bool contentPseudoCrossing = false;
     };
 
     static bool extractInvalidationSetFeature(const CSSSelector&, InvalidationSetFeatures&);
 
     enum UseFeaturesType { UseFeatures, ForceSubtree };
 
     enum PositionType { Subject, Ancestor };
     std::pair<const CSSSelector*, UseFeaturesType> extractInvalidationSetFeatures(const CSSSelector&, InvalidationSetFeatures&, PositionType, CSSSelector::PseudoType = CSSSelector::PseudoUnknown);
 
     void addFeaturesToInvalidationSet(InvalidationSet&, const InvalidationSetFeatures&);
     void addFeaturesToInvalidationSets(const CSSSelector*, InvalidationSetFeatures* siblingFeatures, InvalidationSetFeatures& descendantFeatures);
 
     void addClassToInvalidationSet(const AtomicString& className, Element&);
 
     FeatureMetadata m_metadata;
     InvalidationSetMap m_classInvalidationSets;
     InvalidationSetMap m_attributeInvalidationSets;
     InvalidationSetMap m_idInvalidationSets;
     PseudoTypeInvalidationSetMap m_pseudoInvalidationSets;
 
     friend class RuleFeatureSetTest;
 };
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::RuleFeature);
 
 #endif // RuleFeature_h