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

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

Index: third_party/WebKit/Source/core/html/HTMLDialogElement.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLDialogElement.idl b/third_party/WebKit/Source/core/html/HTMLDialogElement.idl
index e6704616f29c3164b46f5a32d31e02d4969993a7..a7c733179e75dd0775649add18a02b448924e87b 100644
--- a/third_party/WebKit/Source/core/html/HTMLDialogElement.idl
+++ b/third_party/WebKit/Source/core/html/HTMLDialogElement.idl
@@ -28,9 +28,8 @@
 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);
 };