ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.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 34 matching lines @@
 class ExceptionState;
 class ExecutionContext;
 class HTMLMediaElement;
 class MediaKeySession;
 class ScriptState;
 class WebContentDecryptionModule;
 
 // References are held by JS and HTMLMediaElement.
 // The WebContentDecryptionModule has the same lifetime as this object.
 class MediaKeys : public GarbageCollectedFinalized<MediaKeys>,
-                  public ActiveScriptWrappable,
+                  public ActiveScriptWrappable<MediaKeys>,
                   public SuspendableObject,
                   public ScriptWrappable {
   USING_GARBAGE_COLLECTED_MIXIN(MediaKeys);
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static MediaKeys* create(
       ExecutionContext*,
       const WebVector<WebEncryptedMediaSessionType>& supportedSessionTypes,
       std::unique_ptr<WebContentDecryptionModule>);
@@ skipping 61 matching lines @@
   // object will be prevented until the setMediaKeys() completes.
   bool m_reservedForMediaElement;
 
   HeapDeque<Member<PendingAction>> m_pendingActions;
   Timer<MediaKeys> m_timer;
 };
 
 }  // namespace blink
 
 #endif  // MediaKeys_h