extend timeout on wpt tests because linux asan

Differential Revision: https://phabricator.services.mozilla.com/D10396

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1503624
gecko-commit: 29ebdc54d6bc82f8e5696f5129feffe2929460f3
gecko-integration-branch: autoland
gecko-reviewers: jgraham

html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/resources/message-opener.html

@@ -1,12 +1,12 @@
 <script src="/common/PrefixedPostMessage.js"></script>
 <script>
 var prefixedMessage = new PrefixedMessageResource();
-var max = 50, attempts = 0;
+var max = 150, attempts = 0;
 function sendCoordinates() {
   // Certain windowing systems position windows asynchronously.
   // As a result, the window may not be positioned yet when the
   // load event fires. To accommodate this, allow waiting up to
-  // 5 seconds for positioning to take place.
+  // 15 seconds for positioning to take place.
   if (!window.screenX && !window.screenY && ++attempts < max) {
     setTimeout(sendCoordinates, 100);
     return;