Invalidate CustomScrollbars on having window-inactive selector.

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 462 matching lines @@
     return *addResult.storedValue->value;
 }
 
 void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector, RuleFeatureSet::FeatureMetadata& metadata)
 {
     unsigned maxDirectAdjacentSelectors = 0;
 
     for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
         if (current->pseudoType() == CSSSelector::PseudoFirstLine)
             metadata.usesFirstLineRules = true;
+        if (current->pseudoType() == CSSSelector::PseudoWindowInactive)
+            metadata.usesWindowInactiveSelector = true;
         if (current->isDirectAdjacentSelector()) {
             maxDirectAdjacentSelectors++;
         } else if (maxDirectAdjacentSelectors) {
             if (maxDirectAdjacentSelectors > metadata.maxDirectAdjacentSelectors)
                 metadata.maxDirectAdjacentSelectors = maxDirectAdjacentSelectors;
             maxDirectAdjacentSelectors = 0;
         }
         if (current->isSiblingSelector())
             metadata.foundSiblingSelector = true;
 
         const CSSSelectorList* selectorList = current->selectorList();
         if (!selectorList)
             continue;
 
         for (const CSSSelector* selector = selectorList->first(); selector; selector = CSSSelectorList::next(*selector))
             collectFeaturesFromSelector(*selector, metadata);
     }
 
     ASSERT(!maxDirectAdjacentSelectors);
 }
 
 void RuleFeatureSet::FeatureMetadata::add(const FeatureMetadata& other)
 {
     usesFirstLineRules = usesFirstLineRules || other.usesFirstLineRules;
+    usesWindowInactiveSelector = usesWindowInactiveSelector || other.usesWindowInactiveSelector;
     maxDirectAdjacentSelectors = std::max(maxDirectAdjacentSelectors, other.maxDirectAdjacentSelectors);
 }
 
 void RuleFeatureSet::FeatureMetadata::clear()
 {
     usesFirstLineRules = false;
+    usesWindowInactiveSelector = false;
     foundSiblingSelector = false;
     maxDirectAdjacentSelectors = 0;
 }
 
 void RuleFeatureSet::add(const RuleFeatureSet& other)
 {
     for (const auto& invalidationSet : other.m_classInvalidationSets)
         ensureClassInvalidationSet(invalidationSet.key).combine(*invalidationSet.value);
     for (const auto& invalidationSet : other.m_attributeInvalidationSets)
         ensureAttributeInvalidationSet(invalidationSet.key).combine(*invalidationSet.value);
@@ skipping 117 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