oobe: Fix EulaTest.DisplayTpmPassword flakiness

Bug: 1113377
Change-Id: If0db3269c944955649caa486964dfcbdb1d2d329
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339965Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Danila Kuzmin <dkuzmin@google.com>
Cr-Commit-Position: refs/heads/master@{#795464}

chrome/browser/chromeos/login/eula_browsertest.cc

@@ -320,7 +320,7 @@ IN_PROC_BROWSER_TEST_F(EulaTest, DisplaysTpmPassword) {
   ShowEulaScreen();
 
   test::OobeJS().TapLinkOnPath(kSecuritySettingsLink);
-  test::OobeJS().ExpectVisiblePath(kSecuritySettingsDialog);
+  test::OobeJS().CreateVisibilityWaiter(true, kSecuritySettingsDialog)->Wait();
 
   test::OobeJS()
       .CreateWaiter(