Use C++11 range-based loop for core/css

Source/core/css/ElementRuleCollector.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 123 matching lines @@
 
 private:
     void collectRuleIfMatches(const RuleData&, CascadeScope, CascadeOrder, const MatchRequest&, RuleRange&);
 
     template<typename RuleDataListType>
     void collectMatchingRulesForList(const RuleDataListType* rules, CascadeScope cascadeScope, CascadeOrder cascadeOrder, const MatchRequest& matchRequest, RuleRange& ruleRange)
     {
         if (!rules)
             return;
 
-        for (typename RuleDataListType::const_iterator it = rules->begin(), end = rules->end(); it != end; ++it)
-            collectRuleIfMatches(*it, cascadeScope, cascadeOrder, matchRequest, ruleRange);
+        for (const auto& rule : *rules)
+            collectRuleIfMatches(rule, cascadeScope, cascadeOrder, matchRequest, ruleRange);
     }
 
     bool ruleMatches(const RuleData&, const ContainerNode* scope, SelectorChecker::MatchResult*);
 
     CSSRuleList* nestedRuleList(CSSRule*);
     template<class CSSRuleCollection>
     CSSRule* findStyleRule(CSSRuleCollection*, StyleRule*);
     void appendCSSOMWrapperForRule(CSSStyleSheet*, StyleRule*);
 
     void sortMatchedRules();
@@ skipping 18 matching lines @@
 
     // Output.
     RefPtrWillBeMember<StaticCSSRuleList> m_cssRuleList;
     RefPtrWillBeMember<StyleRuleList> m_styleRuleList;
     MatchResult m_result;
 };
 
 } // namespace blink
 
 #endif // ElementRuleCollector_h