Removed unused matching behavior.

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 626 matching lines @@
     }
 
     bool needsCollection = false;
     CSSDefaultStyleSheets::instance().ensureDefaultStyleSheetsForElement(element, needsCollection);
     if (needsCollection)
         collectFeatures();
 
     {
         ElementRuleCollector collector(state.elementContext(), m_selectorFilter, state.style());
 
-        if (matchingBehavior == MatchOnlyUserAgentRules)
-            matchUARules(collector);
-        else
-            matchAllRules(state, collector, matchingBehavior != MatchAllRulesExcludingSMIL);
+        matchAllRules(state, collector, matchingBehavior != MatchAllRulesExcludingSMIL);
 
         applyMatchedProperties(state, collector.matchedResult());
 
         addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
     }
     {
         StyleAdjuster adjuster(state.cachedUAStyle(), m_document.inQuirksMode());
         adjuster.adjustRenderStyle(state.style(), state.parentStyle(), element);
     }
 
@@ skipping 702 matching lines @@
     visitor->trace(m_keyframesRuleMap);
     visitor->trace(m_viewportDependentMediaQueryResults);
     visitor->trace(m_viewportStyleResolver);
     visitor->trace(m_siblingRuleSet);
     visitor->trace(m_uncommonAttributeRuleSet);
     visitor->trace(m_watchedSelectorsRules);
     visitor->trace(m_treeBoundaryCrossingRules);
 }
 
 } // namespace WebCore