Support style invalidation for ::content.

Source/core/css/RuleFeature.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 35 matching lines @@
     if (selector.match() == CSSSelector::Tag) {
         ASSERT(selector.tagQName().localName() == starAtom);
         return true;
     }
     if (selector.match() == CSSSelector::PseudoElement) {
         switch (selector.pseudoType()) {
         case CSSSelector::PseudoBefore:
         case CSSSelector::PseudoAfter:
         case CSSSelector::PseudoBackdrop:
         case CSSSelector::PseudoShadow:
+        case CSSSelector::PseudoContent:
             return true;
         default:
             ASSERT(!selector.isCustomPseudoElement());
             return false;
         }
     }
     if (selector.match() != CSSSelector::PseudoClass)
         return false;
     switch (selector.pseudoType()) {
     case CSSSelector::PseudoEmpty:
@@ skipping 215 matching lines @@
 // ContainerNode::checkForChildrenAdjacentRuleChanges.
 //
 // As we encounter a descendant type of combinator, the features only need to be checked
 // against descendants in the same subtree only. features.adjacent is set to false, and
 // we start adding features instead of calling setWholeSubtreeInvalid.
 
 void RuleFeatureSet::addFeaturesToInvalidationSet(DescendantInvalidationSet& invalidationSet, const InvalidationSetFeatures& features)
 {
     if (features.treeBoundaryCrossing)
         invalidationSet.setTreeBoundaryCrossing();
+    if (features.insertionPointCrossing)
+        invalidationSet.setInsertionPointCrossing();
     if (features.adjacent) {
         invalidationSet.setWholeSubtreeInvalid();
         return;
     }
     if (!features.id.isEmpty())
         invalidationSet.addId(features.id);
     if (!features.tagName.isEmpty())
         invalidationSet.addTagName(features.tagName);
     for (const auto& className : features.classes)
         invalidationSet.addClass(className);
     for (const auto& attribute : features.attributes)
         invalidationSet.addAttribute(attribute);
     if (features.customPseudoElement)
         invalidationSet.setCustomPseudoInvalid();
 }
 
 void RuleFeatureSet::addFeaturesToInvalidationSets(const CSSSelector& selector, InvalidationSetFeatures& features)
 {
     for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
         if (DescendantInvalidationSet* invalidationSet = invalidationSetForSelector(*current)) {
             addFeaturesToInvalidationSet(*invalidationSet, features);
         } else {
-            if (current->pseudoType() == CSSSelector::PseudoHost)
+            if (current->isTreeBoundaryCrossing())
                 features.treeBoundaryCrossing = true;
+            if (current->isInsertionPointCrossing())
+                features.insertionPointCrossing = true;
             if (const CSSSelectorList* selectorList = current->selectorList()) {
                 ASSERT(current->pseudoType() == CSSSelector::PseudoHost || current->pseudoType() == CSSSelector::PseudoAny || current->pseudoType() == CSSSelector::PseudoNot);
                 for (const CSSSelector* selector = selectorList->first(); selector; selector = CSSSelectorList::next(*selector))
                     addFeaturesToInvalidationSets(*selector, features);
             }
         }
 
         if (current->relation() == CSSSelector::SubSelector)
             continue;
 
@@ skipping 226 matching lines @@
     visitor->trace(uncommonAttributeRules);
     visitor->trace(m_classInvalidationSets);
     visitor->trace(m_attributeInvalidationSets);
     visitor->trace(m_idInvalidationSets);
     visitor->trace(m_pseudoInvalidationSets);
     visitor->trace(m_styleInvalidator);
 #endif
 }
 
 } // namespace blink