Call media query change listeners asynchronously.

Source/core/css/MediaQueryMatcher.h

 /*
  * 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
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  */
 
 #ifndef MediaQueryMatcher_h
 #define MediaQueryMatcher_h
 
+#include "core/css/MediaQueryList.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class Document;
 class MediaQueryList;
 class MediaQueryListListener;
@@ skipping 12 matching lines @@
     void documentDetached();
 
     void addMediaQueryList(MediaQueryList*);
     void removeMediaQueryList(MediaQueryList*);
 
     PassRefPtrWillBeRawPtr<MediaQueryList> matchMedia(const String&);
 
     void mediaFeaturesChanged();
     bool evaluate(const MediaQuerySet*);
 
+    void notifyDelayedListeners();
+    bool hasDelayedListeners() const { return m_delayedListeners.size(); }
+
     void trace(Visitor*);
 
 private:
     explicit MediaQueryMatcher(Document&);
 
     PassOwnPtr<MediaQueryEvaluator> createEvaluator() const;
 
     RawPtrWillBeMember<Document> m_document;
     OwnPtr<MediaQueryEvaluator> m_evaluator;
 
+    WillBeHeapVector<RefPtrWillBeMember<MediaQueryList::Listener> > m_delayedListeners;
+
     typedef WillBeHeapLinkedHashSet<RawPtrWillBeWeakMember<MediaQueryList> > MediaQueryListSet;
     MediaQueryListSet m_mediaLists;
 };
 
 }
 
 #endif // MediaQueryMatcher_h