Sync the XHR-related interfaces with the spec

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 104 matching lines @@
     virtual const AtomicString& interfaceName() const override;
 
     // JavaScript attributes and methods
     const KURL& url() const { return m_url; }
     String statusText() const;
     int status() const;
     State readyState() const;
     bool withCredentials() const { return m_includeCredentials; }
     void setWithCredentials(bool, ExceptionState&);
     void open(const AtomicString& method, const String& url, ExceptionState&);
-    void open(const AtomicString& method, const String& url, bool async, ExceptionState&);
-    void open(const AtomicString& method, const String& url, bool async, const String& user, ExceptionState&);
-    void open(const AtomicString& method, const String& url, bool async, const String& user, const String& password, ExceptionState&);
+    void open(const AtomicString& method, const String& url, bool async, const String& username, const String& password, ExceptionState&);
     void open(const AtomicString& method, const KURL&, bool async, ExceptionState&);
-    void send(ExceptionState&);
     void send(const ArrayBufferOrArrayBufferViewOrBlobOrDocumentOrStringOrFormData&, ExceptionState&);
     void abort();
     void setRequestHeader(const AtomicString& name, const AtomicString& value, ExceptionState&);
     void overrideMimeType(const AtomicString& override, ExceptionState&);
     String getAllResponseHeaders() const;
     const AtomicString& getResponseHeader(const AtomicString&) const;
     ScriptString responseText(ExceptionState&);
     ScriptString responseJSONSource();
     Document* responseXML(ExceptionState&);
     Blob* responseBlob();
@@ skipping 183 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