Make Document.createTouch arguments non-optional

third_party/WebKit/LayoutTests/fast/events/touch/touch-event-dispatch-no-crash.html

Index: third_party/WebKit/LayoutTests/fast/events/touch/touch-event-dispatch-no-crash.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/touch/touch-event-dispatch-no-crash.html b/third_party/WebKit/LayoutTests/fast/events/touch/touch-event-dispatch-no-crash.html
index 12de76a2b005fb9dcbcb9d61246b802f079bdda7..2bbd6a85542814479d1116b8a7a036121d5f67ad 100644
--- a/third_party/WebKit/LayoutTests/fast/events/touch/touch-event-dispatch-no-crash.html
+++ b/third_party/WebKit/LayoutTests/fast/events/touch/touch-event-dispatch-no-crash.html
@@ -6,8 +6,15 @@
 <script type="text/javascript">
 description('Test that touches created with no target does not crash during dispatch. http://crbug.com/517962');
 
+var box = document.createElement("div");

[foolip, 2017/03/21 08:01:13]

Why these changes? Just adding null and 0 arguments to the createTouch call
should suffice.

[lunalu1, 2017/03/21 19:19:27]

Done.

+box.id = "box";
+box.style.width = "100px";
+box.style.height = "100px";
+document.body.appendChild(box);
+
+var target = document.getElementById("box");
 var event = new TouchEvent('touchstart', {
-    touches: [document.createTouch()],
+    touches: [document.createTouch(window, target, 1, 100, 101, 102, 103)],
 });
 document.body.dispatchEvent(event);