Use the HashSet of attribute names in SharedStyleFinder.

sky/engine/core/css/resolver/StyleResolver.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, 2013 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 185 matching lines @@
     collectFeatures();
 
     if (document().renderView() && document().renderView()->style())
         document().renderView()->style()->font().update(document().styleEngine()->fontSelector());
 }
 
 void StyleResolver::resetRuleFeatures()
 {
     // Need to recreate RuleFeatureSet.
     m_features.clear();
-    m_attributeRuleSet.clear();
     m_needCollectFeatures = true;
 }
 
 void StyleResolver::processScopedRules(const RuleSet& authorRules, CSSStyleSheet* parentStyleSheet, unsigned parentIndex, ContainerNode& scope)
 {
     const Vector<RawPtr<StyleRuleKeyframes> > keyframesRules = authorRules.keyframesRules();
     ScopedStyleResolver* resolver = &scope.treeScope().ensureScopedStyleResolver();
     document().styleEngine()->addScopedStyleResolver(resolver);
     for (unsigned i = 0; i < keyframesRules.size(); ++i)
         resolver->addKeyframeStyle(keyframesRules[i]);
@@ skipping 17 matching lines @@
     resolver->resetAuthorStyle();
     resetRuleFeatures();
     if (treeScope.rootNode().isDocumentNode())
         return;
 
     // resolver is going to be freed below.
     document().styleEngine()->removeScopedStyleResolver(resolver);
     treeScope.clearScopedStyleResolver();
 }
 
-static PassOwnPtr<RuleSet> makeRuleSet(const Vector<RuleFeature>& rules)
-{
-    size_t size = rules.size();
-    if (!size)
-        return nullptr;
-    OwnPtr<RuleSet> ruleSet = RuleSet::create();
-    for (size_t i = 0; i < size; ++i)
-        ruleSet->addRule(rules[i].rule, rules[i].selectorIndex, RuleHasNoSpecialState);
-    return ruleSet.release();
-}
-
 void StyleResolver::collectFeatures()
 {
     m_features.clear();
     m_features.add(defaultStyles().features());
 
     document().styleEngine()->collectScopedStyleFeaturesTo(m_features);
 
-    m_attributeRuleSet = makeRuleSet(m_features.attributeRules);
     m_needCollectFeatures = false;
 }
 
 bool StyleResolver::hasRulesForId(const AtomicString& id) const
 {
     return m_features.hasSelectorForId(id);
 }
 
 void StyleResolver::addToStyleSharingList(Element& element)
 {
@@ skipping 169 matching lines @@
         return s_styleNotYetAvailable;
     }
 
     didAccess();
 
     if (element == document().documentElement())
         document().setDirectionSetOnDocumentElement(false);
     StyleResolverState state(document(), element, defaultParent);
 
     if (sharingBehavior == AllowStyleSharing && state.parentStyle()) {
-        SharedStyleFinder styleFinder(state.elementContext(), m_features, m_attributeRuleSet.get(), *this);
+        SharedStyleFinder styleFinder(state.elementContext(), m_features, *this);
         if (RefPtr<RenderStyle> sharedStyle = styleFinder.findSharedStyle())
             return sharedStyle.release();
     }
 
     if (state.parentStyle()) {
         state.setStyle(RenderStyle::create());
         state.style()->inheritFrom(state.parentStyle(), isAtShadowBoundary(element) ? RenderStyle::AtShadowBoundary : RenderStyle::NotAtShadowBoundary);
     } else {
         state.setStyle(defaultStyleForElement());
         state.setParentStyle(RenderStyle::clone(state.style()));
@@ skipping 487 matching lines @@
 bool StyleResolver::mediaQueryAffectedByViewportChange() const
 {
     for (unsigned i = 0; i < m_viewportDependentMediaQueryResults.size(); ++i) {
         if (m_medium->eval(m_viewportDependentMediaQueryResults[i]->expression()) != m_viewportDependentMediaQueryResults[i]->result())
             return true;
     }
     return false;
 }
 
 } // namespace blink