ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 45 matching lines @@
 // 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 EventTargetWithInlineData,
-      public ActiveScriptWrappable,
+      public ActiveScriptWrappable<MediaKeySession>,
       public SuspendableObject,
       private WebContentDecryptionModuleSession::Client {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(MediaKeySession);
   USING_PRE_FINALIZER(MediaKeySession, dispose);
 
  public:
   static MediaKeySession* create(ScriptState*,
                                  MediaKeys*,
                                  WebEncryptedMediaSessionType);
@@ skipping 81 matching lines @@
       ClosedPromise;
   Member<ClosedPromise> m_closedPromise;
 
   HeapDeque<Member<PendingAction>> m_pendingActions;
   Timer<MediaKeySession> m_actionTimer;
 };
 
 }  // namespace blink
 
 #endif  // MediaKeySession_h