Bot failure:
https://ci.chromium.org/buildbot/tryserver.chromium.android/linux_android_rel_ng/442639

Stack trace:
java.lang.AssertionError
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.chromium.content.browser.test.util.CriteriaHelper.pollInstrumentationThread(CriteriaHelper.java:93)
	at org.chromium.content.browser.test.util.CriteriaHelper.pollUiThread(CriteriaHelper.java:172)
	at org.chromium.content.browser.test.util.CriteriaHelper.pollUiThread(CriteriaHelper.java:211)
	at org.chromium.content.browser.test.util.CriteriaHelper.pollUiThread(CriteriaHelper.java:223)
	at org.chromium.content.browser.test.util.CriteriaHelper.pollUiThread(CriteriaHelper.java:234)
	at org.chromium.chrome.browser.widget.bottomsheet.BottomSheetBackBehaviorTest.hideBrowserControls(BottomSheetBackBehaviorTest.java:274)
	at org.chromium.chrome.browser.widget.bottomsheet.BottomSheetBackBehaviorTest.testBackButton_backButtonOpensSheetAndShowsToolbar(BottomSheetBackBehaviorTest.java:171)