ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h

 /*
  *  Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@nypop.com>
  *  Copyright (C) 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
@@ skipping 52 matching lines @@
 class TextResourceDecoder;
 class ThreadableLoader;
 class WebDataConsumerHandle;
 class XMLHttpRequestUpload;
 
 typedef int ExceptionCode;
 
 class XMLHttpRequest final : public XMLHttpRequestEventTarget,
                              private ThreadableLoaderClient,
                              public DocumentParserClient,
-                             public ActiveScriptWrappable,
+                             public ActiveScriptWrappable<XMLHttpRequest>,
                              public SuspendableObject {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(XMLHttpRequest);
 
  public:
   static XMLHttpRequest* create(ScriptState*);
   static XMLHttpRequest* create(ExecutionContext*);
   ~XMLHttpRequest() override;
 
   // These exact numeric values are important because JS expects them.
@@ skipping 253 matching lines @@
   bool m_downloadingToFile;
   bool m_responseTextOverflow;
   bool m_sendFlag;
 };
 
 std::ostream& operator<<(std::ostream&, const XMLHttpRequest*);
 
 }  // namespace blink
 
 #endif  // XMLHttpRequest_h