https://chromium-swarm.appspot.com/task?id=3c0ec95e544a1010&refresh=10&show_raw=1:

[ RUN      ] AutofillPopupControllerBrowserTest.HidePopupOnWindowResize
[5120:5120:0305/034951.686282:WARNING:chrome_browser_main_chromeos.cc(613)] Running as stub user with profile dir: test-user
[5120:5135:0305/034952.512929:ERROR:logging_chrome.cc(218)] Unable to create symlink /b/s/w/it8ECf_7/.org.chromium.Chromium.uzU0KF/daK7J8A/test-user/chrome_debug.log pointing at /b/s/w/it8ECf_7/.org.chromium.Chromium.uzU0KF/daK7J8A/test-user/chrome_debug_20180305-034952: No such file or directory (2)
[5120:5120:0305/034952.723441:WARNING:user_session_manager.cc(1060)] Attempting to save user password for non enterprise user.
[5120:5120:0305/034953.118266:ERROR:network_type_pattern.cc(134)] NetworkTypePattern: wifi: Can not match empty type.
[5120:5120:0305/034953.119654:ERROR:network_type_pattern.cc(134)] NetworkTypePattern: wifi: Can not match empty type.
[5120:5120:0305/034953.122139:ERROR:network_type_pattern.cc(134)] NetworkTypePattern: wifi: Can not match empty type.
[5120:5120:0305/034953.122628:ERROR:network_type_pattern.cc(134)] NetworkTypePattern: wifi: Can not match empty type.
[5120:5120:0305/034953.395273:ERROR:wallpaper_controller.cc(1263)] User is ephemeral or guest! Fallback to default wallpaper.
[5160:5160:0305/034953.718283:FATAL:autofill_agent.cc(475)] Check failed: false.