http/tests/inspector/indexeddb/database-names.html is incredibly flaky and has been for a long time:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=http%2Ftests%2Finspector%2Findexeddb%2Fdatabase-names.html&testType=webkit_tests

I am going to suppress this test. Inspector team, can you take a look? This may be related to https://crbug.com/733448