Sync the XHR-related interfaces with the spec

Source/core/xmlhttprequest/XMLHttpRequest.h

Index: Source/core/xmlhttprequest/XMLHttpRequest.h
diff --git a/Source/core/xmlhttprequest/XMLHttpRequest.h b/Source/core/xmlhttprequest/XMLHttpRequest.h
index a9e3379f4926b31dd6cacb215ecbba622e78bb35..09d9f926ad4daa753310673fb1d42d1725b7d8cb 100644
--- a/Source/core/xmlhttprequest/XMLHttpRequest.h
+++ b/Source/core/xmlhttprequest/XMLHttpRequest.h
@@ -122,11 +122,8 @@ public:
     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&);