MediaQueryList::evaluate should return a bool

Source/core/css/MediaQueryList.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  *  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,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 46 matching lines @@
 }
 
 void MediaQueryList::removeListener(PassRefPtrWillBeRawPtr<MediaQueryListListener> listener)
 {
     if (!listener)
         return;
 
     m_matcher->removeListener(listener.get(), this);
 }
 
-void MediaQueryList::evaluate(MediaQueryEvaluator* evaluator, bool& notificationNeeded)
+bool MediaQueryList::evaluate(MediaQueryEvaluator* evaluator)
 {
     if (m_evaluationRound != m_matcher->evaluationRound() && evaluator)
         setMatches(evaluator->eval(m_media.get()));
-    notificationNeeded = m_changeRound == m_matcher->evaluationRound();
+    return m_changeRound == m_matcher->evaluationRound();
 }
 
 void MediaQueryList::setMatches(bool newValue)
 {
     m_evaluationRound = m_matcher->evaluationRound();
 
     if (newValue == m_matches)
         return;
 
     m_matches = newValue;
     m_changeRound = m_evaluationRound;
 }
 
 bool MediaQueryList::matches()
 {
     if (m_evaluationRound != m_matcher->evaluationRound())
         setMatches(m_matcher->evaluate(m_media.get()));
     return m_matches;
 }
 
 void MediaQueryList::trace(Visitor* visitor)
 {
     visitor->trace(m_matcher);
     visitor->trace(m_media);
 }
 
 }