[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/encryptedmedia/MediaKeySession.h

 /*
  * Copyright (C) 2013 Apple 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.
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  *    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 APPLE INC. AND ITS CONTRIBUTORS ``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 APPLE INC. OR ITS 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
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 #ifndef MediaKeySession_h
 #define MediaKeySession_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromiseProperty.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/DOMArrayPiece.h"
 #include "modules/EventTargetModules.h"
 #include "modules/encryptedmedia/MediaKeyStatusMap.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebContentDecryptionModuleSession.h"
 #include "public/platform/WebEncryptedMediaTypes.h"
 
@@ skipping 14 matching lines @@
 // when it gets destroyed. When the Oilpan garbage collector determines that
 // only WeakMember<> references remain to the MediaKeys object, the MediaKeys
 // object will be finalized and the WeakMember<> references will be cleared
 // out(zeroed) by the garbage collector.
 //
 // Because this object controls the lifetime of the WebContentDecryptionModuleSession,
 // it may outlive any JavaScript references as long as the MediaKeys object is alive.
 // The WebContentDecryptionModuleSession has the same lifetime as this object.
 class MediaKeySession final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<MediaKeySession>
+    , public ActiveScriptWrappable
     , public ActiveDOMObject
     , private WebContentDecryptionModuleSession::Client {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaKeySession);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaKeySession);
 public:
     static MediaKeySession* create(ScriptState*, MediaKeys*, WebEncryptedMediaSessionType);
     ~MediaKeySession() override;
 
     String sessionId() const;
     double expiration() const { return m_expiration; }
     ScriptPromise closed(ScriptState*);
     MediaKeyStatusMap* keyStatuses();
 
     ScriptPromise generateRequest(ScriptState*, const String& initDataType, const DOMArrayPiece& initData);
     ScriptPromise load(ScriptState*, const String& sessionId);
 
     ScriptPromise update(ScriptState*, const DOMArrayPiece& response);
     ScriptPromise close(ScriptState*);
     ScriptPromise remove(ScriptState*);
 
     // EventTarget
     const AtomicString& interfaceName() const override;
     ExecutionContext* getExecutionContext() const override;
 
+    // ActiveScriptWrappable
+    bool hasPendingActivity() const final;
+
     // ActiveDOMObject
-    bool hasPendingActivity() const override;
     void stop() override;
 
     // Oilpan: eagerly release owned m_session, which in turn
     // drops the client reference back to this MediaKeySession object.
     EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
 
 private:
     class PendingAction;
     friend class NewSessionResultPromise;
@@ skipping 35 matching lines @@
     typedef ScriptPromiseProperty<Member<MediaKeySession>, ToV8UndefinedGenerator, Member<DOMException>> ClosedPromise;
     Member<ClosedPromise> m_closedPromise;
 
     HeapDeque<Member<PendingAction>> m_pendingActions;
     Timer<MediaKeySession> m_actionTimer;
 };
 
 } // namespace blink
 
 #endif // MediaKeySession_h