Add DialogShowParams to <dialog>'s show() and showModal()

third_party/WebKit/Source/core/html/HTMLDialogElement.idl

 /*
  * Copyright (C) 2012 Google 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 10 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // https://html.spec.whatwg.org/#the-dialog-element
 
 interface HTMLDialogElement : HTMLElement {
     [CEReactions, Reflect] attribute boolean open;
     attribute DOMString returnValue;
-    // FIXME: show() and showModal() should take an anchor argument.
-    [CEReactions] void show();
-    [CEReactions, RaisesException] void showModal();
+    [CEReactions] void show(optional DialogShowParams params);
+    [CEReactions, RaisesException] void showModal(optional DialogShowParams params);
     // FIXME: The returnValue argument should have no default value.
     [CEReactions, RaisesException] void close(optional DOMString returnValue = null);
 };