Make MediaQueryList an ActiveDOMElement

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
  *  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.
  */
 
 #include "config.h"
 #include "core/css/MediaQueryList.h"
 
 #include "core/css/MediaList.h"
 #include "core/css/MediaQueryEvaluator.h"
 #include "core/css/MediaQueryListListener.h"
 #include "core/css/MediaQueryMatcher.h"
 
 namespace blink {
 
-PassRefPtrWillBeRawPtr<MediaQueryList> MediaQueryList::create(PassRefPtrWillBeRawPtr<MediaQueryMatcher> matcher, PassRefPtrWillBeRawPtr<MediaQuerySet> media)
+PassRefPtrWillBeRawPtr<MediaQueryList> MediaQueryList::create(ExecutionContext* context, PassRefPtrWillBeRawPtr<MediaQueryMatcher> matcher, PassRefPtrWillBeRawPtr<MediaQuerySet> media)
 {
-    return adoptRefWillBeNoop(new MediaQueryList(matcher, media));
+    RefPtrWillBeRawPtr<MediaQueryList> list = adoptRefWillBeNoop(new MediaQueryList(context, matcher, media));
+    list->suspendIfNeeded();
+    return list.release();
 }
 
-MediaQueryList::MediaQueryList(PassRefPtrWillBeRawPtr<MediaQueryMatcher> matcher, PassRefPtrWillBeRawPtr<MediaQuerySet> media)
-    : m_matcher(matcher)
+MediaQueryList::MediaQueryList(ExecutionContext* context, PassRefPtrWillBeRawPtr<MediaQueryMatcher> matcher, PassRefPtrWillBeRawPtr<MediaQuerySet> media)
+    : ActiveDOMObject(context)
+    , m_matcher(matcher)
     , m_media(media)
     , m_matchesDirty(true)
     , m_matches(false)
 {
     m_matcher->addMediaQueryList(this);
     updateMatches();
 }
 
 MediaQueryList::~MediaQueryList()
 {
@@ skipping 27 matching lines @@
     for (ListenerList::iterator it = m_listeners.begin(), end = m_listeners.end(); it != end; ++it) {
         // We can't just use m_listeners.remove() here, because we get a new wrapper for the
         // listener callback every time. We have to use MediaQueryListListener::operator==.
         if (**it == *listener.get()) {
             m_listeners.remove(it);
             break;
         }
     }
 }
 
-void MediaQueryList::documentDetached()
+bool MediaQueryList::hasPendingActivity() const
+{
+    return m_listeners.size();
+}
+
+void MediaQueryList::stop()
 {
     m_listeners.clear();
 }
 
 void MediaQueryList::mediaFeaturesChanged(WillBeHeapVector<RefPtrWillBeMember<MediaQueryListListener> >* listenersToNotify)
 {
     m_matchesDirty = true;
     if (!updateMatches())
         return;
     for (ListenerList::const_iterator it = m_listeners.begin(), end = m_listeners.end(); it != end; ++it) {
@@ skipping 20 matching lines @@
 void MediaQueryList::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_matcher);
     visitor->trace(m_media);
     visitor->trace(m_listeners);
 #endif
 }
 
 }