Re-enable Privacy Page UMA logging tests for Polymer3.

Bug: 1066182
Change-Id: Ie3f85da9c31840f54a8538640dfaf2cc42fa3ab4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2131014
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: Theodore Olsauskas-Warren <sauski@google.com>
Commit-Queue: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755140}

chrome/test/data/webui/settings/cr_settings_v3_browsertest.js

@@ -320,8 +320,7 @@ TEST_F(
       runMochaSuite('PrivacyPageSound');
     });
 
-// TODO(sauski): Privacy page UMA changing, tests need updating/removal.
-TEST_F('CrSettingsPrivacyPageV3Test', 'DISABLED_UMALoggingTests', function() {
+TEST_F('CrSettingsPrivacyPageV3Test', 'UMALoggingTests', function() {
   runMochaSuite('PrivacyPageUMACheck');
 });