Chrome Version: ToT (72.0.3616.0)
OS: Linux

What steps will reproduce the problem?
(1) Enable "OmniboxDocumentProvider" in config tests

+++ b/testing/variations/fieldtrial_testing_config.json
@@ -3270,6 +3270,7 @@
                     },
                     "enable_features": [
                         "OmniboxDisplayTitleForCurrentUrl",
+                        "OmniboxDocumentProvider",
                         "OmniboxNewAnswerLayout",

(2) On Linux e.g., build and run:

browser_tests --gtest_filter=CrSettingsPeoplePageSyncPageTest.All

What is the expected result?

Test passes.

What happens instead?
Test fails. Error below.

It would be nice if we could enable this feature during the test (or a test), so that the warning from Finch about the untested feature could go away. (It would also be good to figure out why it would change behavior, which may be perfectly benign.)

[57772:57772:1126/064125.002251:ERROR:web_ui_test_handler.cc(100)] Test Errors: 1/27 tests had failed assertions.
[57772:57772:1126/064125.002513:ERROR:web_ui_browser_test.cc(493)] CONDITION FAILURE: encountered javascript console error(s):
[57772:57772:1126/064125.002570:ERROR:web_ui_browser_test.cc(495)] JS ERROR: '[57772:57772:1126/064116.052937:ERROR:CONSOLE(48)] "Mocha test failed: AdvancedSyncSettingsTests SyncSectionLayout_UnifiedConsentEnabled_SignedIn
AssertionError: expected 3 to equal 4
    at Function.assert.strictEqual (file:///usr/local/google/home/krb/Chrome2/src/third_party/chaijs/chai.js:2277:32)
    at assertEquals (file:///usr/local/google/home/krb/Chrome2/src/chrome/test/data/webui/test_api.js:923:15)
    at Context.<anonymous> (file:///usr/local/google/home/krb/Chrome2/src/chrome/test/data/webui/settings/people_page_sync_page_test.js:223:7)
", source: file:///usr/local/google/home/krb/Chrome2/src/chrome/test/data/webui/mocha_adapter.js (48)
'
[57772:57772:1126/064125.002654:ERROR:web_ui_browser_test.cc(497)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/settings/cr_settings_browsertest-gen.cc:846: Failure
Value of: RunJavascriptTestF( true, "CrSettingsPeoplePageSyncPageTest", "All")
  Actual: false
Expected: true