SitePerProcessBrowserTest.FrameOwnerPropertiesPropagationScrolling is currently disabled on Android because it uses a shrunken body client width as a proxy for having a scrollbar, itself a proxy for being scrollable.

With overlay scrollbars launching on ChromeOS and Linux soon (issue 307091), this leaves just Windows and Mac so I think the test needs to be fixed to maintain coverage.

The test either needs to change how it checks scrollabillity or it should set a mock scrollbar theme for the duration of the test.