This was found in https://chromium-review.googlesource.com/c/557925 .

If we remove FeatureUtilities.cacheChromeHomeEnabled() from setUp(),
one test fails. But we get a failure only when you run the entire junit_chrome, and we don't get into any error if we run NewTabPageAdapterTest only.

I suspect that shared preference set from previous test run affects the current test.

Is there any way to clear it on each test case run?