Url to the check flake page:
https://findit-for-me.appspot.com/waterfall/check-flake?master_name=chromium.linux&builder_name=Android%20Tests&build_number=34836&step_name=chrome_public_test_apk%20on%20Android&test_name=org.chromium.chrome.browser.tabmodel.DocumentModeAssassinTest#testFullMigration


Error message:
Error: Flake analysis is not supported for this request. Either the build step may not be supported or the test is not swarmed.