ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/encryptedmedia/MediaKeys.cpp

 /*
  * 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 121 matching lines @@
   MediaKeys* mediaKeys =
       new MediaKeys(context, supportedSessionTypes, std::move(cdm));
   mediaKeys->suspendIfNeeded();
   return mediaKeys;
 }
 
 MediaKeys::MediaKeys(
     ExecutionContext* context,
     const WebVector<WebEncryptedMediaSessionType>& supportedSessionTypes,
     std::unique_ptr<WebContentDecryptionModule> cdm)
-    : ActiveScriptWrappable(this),
+    : ActiveScriptWrappable<MediaKeys>(this),
       SuspendableObject(context),
       m_supportedSessionTypes(supportedSessionTypes),
       m_cdm(std::move(cdm)),
       m_mediaElement(nullptr),
       m_reservedForMediaElement(false),
       m_timer(this, &MediaKeys::timerFired) {
   DVLOG(MEDIA_KEYS_LOG_LEVEL) << __func__ << "(" << this << ")";
 }
 
 MediaKeys::~MediaKeys() {
@@ skipping 156 matching lines @@
   // Remain around if there are pending events.
   DVLOG(MEDIA_KEYS_LOG_LEVEL)
       << __func__ << "(" << this << ")"
       << (!m_pendingActions.isEmpty() ? " !m_pendingActions.isEmpty()" : "")
       << (m_reservedForMediaElement ? " m_reservedForMediaElement" : "");
 
   return !m_pendingActions.isEmpty() || m_reservedForMediaElement;
 }
 
 }  // namespace blink