Oilpan: implement StyleRuleList without an extra wrapper.

Source/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 1410 matching lines @@
     collector.setMode(SelectorChecker::CollectingStyleRules);
 
     MatchRequest matchRequest(m_watchedSelectorsRules.get(), true);
     RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
     collector.collectMatchingRules(matchRequest, ruleRange);
     collector.sortAndTransferMatchedRules();
 
     RefPtrWillBeRawPtr<StyleRuleList> rules = collector.matchedStyleRuleList();
     if (!rules)
         return;
-    for (size_t i = 0; i < rules->m_list.size(); i++)
-        state.style()->addCallbackSelector(rules->m_list[i]->selectorList().selectorsText());
+    for (size_t i = 0; i < rules->size(); i++)
+        state.style()->addCallbackSelector(rules->at(i)->selectorList().selectorsText());
 }
 
 CSSPropertyValue::CSSPropertyValue(CSSPropertyID id, const StylePropertySet& propertySet)
     : property(id), value(propertySet.getPropertyCSSValue(id).get())
 { }
 
 void StyleResolver::enableStats(StatsReportType reportType)
 {
     if (m_styleResolverStats)
         return;
@@ skipping 72 matching lines @@
     visitor->trace(m_uncommonAttributeRuleSet);
     visitor->trace(m_watchedSelectorsRules);
     visitor->trace(m_treeBoundaryCrossingRules);
     visitor->trace(m_styleSharingLists);
     visitor->trace(m_pendingStyleSheets);
     visitor->trace(m_document);
 #endif
 }
 
 } // namespace blink