Use the HashSet of attribute names in SharedStyleFinder.

sky/engine/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 39 matching lines @@
 void RuleFeatureSet::addSelectorFeatures(const CSSSelector& selector)
 {
     if (selector.match() == CSSSelector::Class)
         m_classNames.add(selector.value());
     else if (selector.match() == CSSSelector::Id)
         m_idNames.add(selector.value());
     else if (selector.isAttributeSelector())
         m_attributeNames.add(selector.attribute().localName());
 }
 
-void RuleFeatureSet::collectFeaturesFromRuleData(const RuleData& ruleData)
-{
-    collectFeaturesFromSelector(ruleData.selector());
-
-    if (ruleData.containsAttributeSelector())
-        attributeRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex()));
-}
-
 void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector)
 {
     for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
         addSelectorFeatures(*current);
         collectFeaturesFromSelectorList(current->selectorList());
    }
 }
 
 void RuleFeatureSet::collectFeaturesFromSelectorList(const CSSSelectorList* selectorList)
 {
     if (!selectorList)
         return;
 
     for (const CSSSelector* selector = selectorList->first(); selector; selector = CSSSelectorList::next(*selector))
         collectFeaturesFromSelector(*selector);
 }
 
 void RuleFeatureSet::add(const RuleFeatureSet& other)
 {
     for (HashSet<AtomicString>::const_iterator it = other.m_classNames.begin(); it != other.m_classNames.end(); ++it)
         m_classNames.add(*it);
     for (HashSet<AtomicString>::const_iterator it = other.m_attributeNames.begin(); it != other.m_attributeNames.end(); ++it)
         m_attributeNames.add(*it);
     for (HashSet<AtomicString>::const_iterator it = other.m_idNames.begin(); it != other.m_idNames.end(); ++it)
         m_idNames.add(*it);
-
-    attributeRules.appendVector(other.attributeRules);
 }
 
 void RuleFeatureSet::clear()
 {
-    attributeRules.clear();
     m_classNames.clear();
     m_attributeNames.clear();
     m_idNames.clear();
 }
 
 void RuleFeatureSet::scheduleStyleInvalidationForClassChange(const SpaceSplitString& changedClasses, Element& element)
 {
     unsigned changedSize = changedClasses.size();
     for (unsigned i = 0; i < changedSize; ++i) {
         scheduleStyleInvalidationForClassChange(changedClasses[i], element);
@@ skipping 53 matching lines @@
     }
 }
 
 void RuleFeatureSet::scheduleStyleInvalidationForClassChange(const AtomicString& className, Element& element)
 {
     if (m_classNames.contains(className))
         element.setNeedsStyleRecalc(LocalStyleChange);
 }
 
 } // namespace blink