Allocate XMLHttpRequest on the eagerly finalized heap.

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 122 matching lines @@
     void setResponseType(const String&, ExceptionState&);
     String responseURL();
 
     // For Inspector.
     void sendForInspectorXHRReplay(PassRefPtr<FormData>, ExceptionState&);
 
     XMLHttpRequestUpload* upload();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(readystatechange);
 
+    // (Also) eagerly finalized so as to prevent access to the eagerly finalized
+    // progress event throttle.
+    EAGERLY_FINALIZE();
+#if !ENABLE(OILPAN)
+    DECLARE_EAGER_FINALIZATION_OPERATOR_NEW();
+#endif
     DECLARE_VIRTUAL_TRACE();
 
 private:
     class BlobLoader;
     XMLHttpRequest(ExecutionContext*, PassRefPtr<SecurityOrigin>);
 
     Document* document() const;
     SecurityOrigin* securityOrigin() const;
 
     void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
@@ skipping 154 matching lines @@
     bool m_sameOriginRequest;
     // True iff the ongoing resource loading is using the downloadToFile
     // option.
     bool m_downloadingToFile;
     bool m_responseTextOverflow;
 };
 
 } // namespace blink
 
 #endif // XMLHttpRequest_h