Bug 1266414 - Fix dt6 browser_modal_device_exit|submit.js failure. r=bustage

MozReview-Commit-ID: 90oZoGDlRDt

devtools/client/responsive.html/test/browser/browser_device_modal_exit.js

@@ -28,7 +28,7 @@ addRDMTask(TEST_URL, function* ({ ui }) {
   uncheckedCb.click();
   closeButton.click();
 
-  ok(modal.classList.contains("hidden"),
+  ok(modal.classList.contains("closed") && !modal.classList.contains("opened"),
     "The device modal is hidden on exit.");
 
   info("Check that the device list remains unchanged after exitting.");

devtools/client/responsive.html/test/browser/browser_device_modal_submit.js

@@ -61,7 +61,7 @@ addRDMTask(TEST_URL, function* ({ ui }) {
   uncheckedCb.click();
   submitButton.click();
 
-  ok(modal.classList.contains("hidden"),
+  ok(modal.classList.contains("closed") && !modal.classList.contains("opened"),
     "The device modal is hidden on submit.");
 
   info("Checking that the new device is added to the user preference list.");