Revert "sheriff: Disable PasswordsAndFormsBrowserTest.uiTests"

This reverts commit 6ad728b1.

Reason for revert:
The revert in https://chromium-review.googlesource.com/c/chromium/src/+/691794 should have fixed
the underlying problem. So we don't need to disable the test. :)

Original change's description:
> sheriff: Disable PasswordsAndFormsBrowserTest.uiTests
> 
> TBR=dpapad@chromium.org
> 
> Bug: 770047
> Change-Id: Iced8b09b937f2a6b202bea47b99dcf6fbe137749
> Reviewed-on: https://chromium-review.googlesource.com/691694
> Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
> Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#505329}

TBR=dpapad@chromium.org,ortuno@chromium.org

Change-Id: I60d94fdf0cf77ed04d0b02f4193b54be66e270bd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 770047
Reviewed-on: https://chromium-review.googlesource.com/691994Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505347}

chrome/test/data/webui/settings/passwords_and_forms_browsertest.js

@@ -46,14 +46,8 @@ PasswordsAndFormsBrowserTest.prototype = {
   },
 };
 
-// TODO(crbug.com/770047): deflake. Fialing on Linux ChromiumOS Test (dbg)(1).
-GEN('#if defined(OS_CHROMEOS) && !defined(NDEBUG)');
-GEN('#define MAYBE_uiTests DISABLED_uiTests');
-GEN('#else');
-GEN('#define MAYBE_uiTests uiTests');
-GEN('#endif');
 /** This test will validate that the section is loaded with data. */
-TEST_F('PasswordsAndFormsBrowserTest', 'MAYBE_uiTests', function() {
+TEST_F('PasswordsAndFormsBrowserTest', 'uiTests', function() {
   var passwordManager;
   var autofillManager;