Reduce ActiveDOMObjects from modules/mediastream/

third_party/WebKit/Source/modules/mediastream/RTCDTMFSender.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GOOGLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef RTCDTMFSender_h
 #define RTCDTMFSender_h
 
-#include "core/dom/ActiveDOMObject.h"
+#include "core/dom/ContextLifecycleObserver.h"
 #include "modules/EventTargetModules.h"
 #include "platform/Timer.h"
 #include "public/platform/WebRTCDTMFSenderHandlerClient.h"
 
 namespace blink {
 
 class ExceptionState;
 class MediaStreamTrack;
 class WebRTCDTMFSenderHandler;
 class WebRTCPeerConnectionHandler;
 
 class RTCDTMFSender final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<RTCDTMFSender>
     , public WebRTCDTMFSenderHandlerClient
-    , public ActiveDOMObject {
+    , public ContextLifecycleObserver {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(RTCDTMFSender);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RTCDTMFSender);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static RTCDTMFSender* create(ExecutionContext*, WebRTCPeerConnectionHandler*, MediaStreamTrack*, ExceptionState&);
     ~RTCDTMFSender() override;
 
     bool canInsertDTMF() const;
     MediaStreamTrack* track() const;
     String toneBuffer() const;
     int duration() const { return m_duration; }
     int interToneGap() const { return m_interToneGap; }
 
     void insertDTMF(const String& tones, ExceptionState&);
     void insertDTMF(const String& tones, int duration, ExceptionState&);
     void insertDTMF(const String& tones, int duration, int interToneGap, ExceptionState&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(tonechange);
 
     // EventTarget
     const AtomicString& interfaceName() const override;
     ExecutionContext* executionContext() const override;
 
-    // ActiveDOMObject
-    void stop() override;
+    void contextDestroyed() override;
 
     // Oilpan: need to eagerly finalize m_handler
     EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
 
 private:
     RTCDTMFSender(ExecutionContext*, MediaStreamTrack*, PassOwnPtr<WebRTCDTMFSenderHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDTMFSender>*);
 
     // WebRTCDTMFSenderHandlerClient
     void didPlayTone(const WebString&) override;
 
     Member<MediaStreamTrack> m_track;
     int m_duration;
     int m_interToneGap;
 
     OwnPtr<WebRTCDTMFSenderHandler> m_handler;
 
-    bool m_stopped;
-
     Timer<RTCDTMFSender> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event>> m_scheduledEvents;
 };
 
 } // namespace blink
 
 #endif // RTCDTMFSender_h