Bug 1443861 - Replace promiseWaitForCondition with TestUtils.waitForCondition

Reviewers: johannh

Reviewed By: johannh

Bug #: 1443861

Differential Revision: https://phabricator.services.mozilla.com/D4293

--HG--
extra : rebase_source : 07711a0f00e4f1c7f3201db250f7c1f455b83e6b

browser/base/content/test/webrtc/browser_devices_get_user_media_anim.js

@@ -58,8 +58,8 @@ var gTests = [
       await closeStream();
 
       // TODO(Bug 1304997): Fix the race in closeStream() and remove this
-      // promiseWaitForCondition().
-      await promiseWaitForCondition(() => !tab.getAttribute("sharing"));
+      // TestUtils.waitForCondition().
+      await TestUtils.waitForCondition(() => !tab.getAttribute("sharing"));
       is(tab.getAttribute("sharing"), "",
          "the tab no longer has the 'sharing' attribute after closing the stream");
     }