Support XMLHttpRequest.send(URLSearchParams)

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

 /*
  * Copyright (C) 2008, 2011 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
@@ skipping 48 matching lines @@
 
     // request
     [RaisesException] void open(DOMString method, DOMString url);
     [RaisesException] void open(DOMString method, DOMString url, boolean async, optional DOMString? username = null, optional DOMString? password = null);
     [RaisesException] void setRequestHeader(DOMString name, DOMString value);
     [RaisesException=Setter] attribute unsigned long timeout;
     [RaisesException=Setter] attribute boolean withCredentials;
     readonly attribute XMLHttpRequestUpload upload;
     // TODO(foolip): The data argument should be of type
     // (Document or BodyInit)?
-    [RaisesException] void send(optional (ArrayBuffer or ArrayBufferView or Blob or Document or DOMString or FormData)? body = null);
+    [RaisesException] void send(optional (ArrayBuffer or ArrayBufferView or Blob or Document or DOMString or FormData or URLSearchParams)? body = null);
     void abort();
 
     // response
     readonly attribute DOMString responseURL;
     readonly attribute unsigned short status;
     readonly attribute DOMString statusText;
     DOMString? getResponseHeader(DOMString name);
     DOMString getAllResponseHeaders();
     [RaisesException] void overrideMimeType(DOMString mime);
     [RaisesException=Setter] attribute XMLHttpRequestResponseType responseType;
     [Custom=Getter, RaisesException=Getter] readonly attribute any response;
     [Custom=Getter, RaisesException=Getter] readonly attribute DOMString responseText;
     // TODO(foolip): responseXML should be [Exposed=Window].
     [RaisesException=Getter] readonly attribute Document? responseXML;
 };