The context:  https://crbug.com/715034 

I am preparing a CL which disables /deep/ combinator (and ::shadow). The CL should be landed for M60.
The WIP CL: https://codereview.chromium.org/2778983006

It looks the following tests are failing in linux_chromium_chromeos_rel_n accoring to the try:
https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_chromeos_rel_ng/builds/412062

SettingsBasicPageBrowserTest.Load
SettingsAutofillSectionBrowserTest.uiTest
CrSettingsSiteDataTest.All
CrSettingsRouteDynamicParametersTest.All
SettingsSiteSettingsPageBrowserTest.labels
CrSettingsPrefUtilTest.All
CrSettingsNonExistentRouteTest.All
SettingsAdvancedPageBrowserTest.Load

dpapad@,
Could you have a chance to take a look at these failing tests?

cc: shans@, hoping shans@ might have some advice.