https://findit-for-me.appspot.com/waterfall/check-flake?master_name=chromium.mac&builder_name=Mac10.9%20Tests&build_number=28900&step_name=browser_tests%20on%20Mac-10.9&test_name=HistoryWebUIWithSchemesTest.groupingWithSchemes

In this example, a long tail of a stable (100% passing) region was examined and a flaky region is visible at the latest part of the graph, however no suspected build was analyzed.

The suspected flake build according to the graph should be somewhere between 28896 and 28898 inclusive, however was missed entirely