Make MediaQueryList an ActiveDOMElement

Source/core/css/MediaQueryMatcher.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 30 matching lines @@
 {
     ASSERT(m_document);
 }
 
 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryMatcher)
 
 void MediaQueryMatcher::documentDetached()
 {
     m_document = nullptr;
     m_evaluator = nullptr;
-
-    // Take a ref to each MediaQueryList as removing the listeners in documentDetached
-    // could release the last ref and mutate the m_mediaLists.
-    WillBeHeapVector<RefPtrWillBeMember<MediaQueryList> > lists;
-    copyToVector(m_mediaLists, lists);
-
-    for (size_t i = 0; i < lists.size(); ++i)
-        lists[i]->documentDetached();
 }
 
 PassOwnPtr<MediaQueryEvaluator> MediaQueryMatcher::createEvaluator() const
 {
     if (!m_document || !m_document->frame())
         return nullptr;
 
     return adoptPtr(new MediaQueryEvaluator(m_document->frame()));
 }
 
@@ skipping 15 matching lines @@
 }
 
 PassRefPtrWillBeRawPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query)
 {
     if (!m_document)
         return nullptr;
 
     RefPtrWillBeRawPtr<MediaQuerySet> media = MediaQuerySet::create(query);
     // Add warning message to inspector whenever dpi/dpcm values are used for "screen" media.
     reportMediaQueryWarningIfNeeded(m_document, media.get());
-    return MediaQueryList::create(this, media);
+    return MediaQueryList::create(m_document, this, media);
 }
 
 void MediaQueryMatcher::addMediaQueryList(MediaQueryList* query)
 {
     if (!m_document)
         return;
     m_mediaLists.add(query);
 }
 
 void MediaQueryMatcher::removeMediaQueryList(MediaQueryList* query)
@@ skipping 17 matching lines @@
 
 void MediaQueryMatcher::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_document);
     visitor->trace(m_mediaLists);
 #endif
 }
 
 }