Revert rev 9211bfa02ed5 (Bug 1315260). Wrong commit message. r=me

MozReview-Commit-ID: 7uFDhNpx4XP

testing/web-platform/meta/XMLHttpRequest/open-url-multi-window-6.htm.ini

@@ -1,5 +0,0 @@
-[open-url-multi-window-6.htm]
-  type: testharness
-  [XMLHttpRequest: open() in document that is not fully active (but may be active) should throw]
-    expected: FAIL
-

testing/web-platform/tests/XMLHttpRequest/open-url-multi-window-6.htm

@@ -26,8 +26,8 @@
                 client = new ifr.contentWindow.XMLHttpRequest();
                 count++;
                 // Important to do a normal navigation, not a reload.
-                win.location.href = "resources/init.htm?avoid-replace";
-              }, 0);
+                win.location.href = "resources/init.htm";
+              }, 100);
             }
             doc.body.appendChild(ifr);
           } else if(1 == count) {