https://findit-for-me.appspot.com/waterfall/check-flake?master_name=chromium.memory&builder_name=Linux%20ASan%20LSan%20Tests%20(1)&build_number=30039&step_name=content_browsertests%20on%20Ubuntu-12.04&test_name=NavigationControllerBrowserTest.RaceCrossOriginNavigationAndSamePageHistoryNavigation

In this example, build 29996 was identified as the suspected flake build. However, it is after a flaky region becomes a stable passing region. The build actually has a 100% pass rate.

In this case according to the graph the flaky region is actually much farther back than the range that was analyzed, or not found.