Replace assert_promise_rejects with upstream promise_rejects.

third_party/WebKit/LayoutTests/http/tests/geofencing/resources/worker-service-not-available.js

 importScripts('../../serviceworker/resources/worker-testharness.js');
-importScripts('../../resources/testharness-helpers.js');
 
 promise_test(function(test) {
-    return assert_promise_rejects(
+    return promise_rejects(
+      test,
+      'AbortError',
       navigator.geofencing.registerRegion(
         new CircularGeofencingRegion({latitude: 37.421999,
                                      longitude: -122.084015})),
-      'AbortError',
       'registerRegion should fail with an AbortError');
   }, 'registerRegion should fail');
 
 promise_test(function(test) {
-    return assert_promise_rejects(
+    return promise_rejects(
+      test,
+      'AbortError',
       navigator.geofencing.unregisterRegion(""),
-      'AbortError',
       'unregisterRegion should fail with an AbortError');
   }, 'unregisterRegion should fail');
 
 promise_test(function(test) {
-    return assert_promise_rejects(
+    return promise_rejects(
+      test,
+      'AbortError',
       navigator.geofencing.getRegisteredRegions(),
-      'AbortError',
       'getRegisteredRegions should fail with an AbortError');
   }, 'getRegisteredRegions should fail');