Since https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Nougat%20Phone%20Tester/6961, three tests have been failing consistently, all related to the Daydream controller:

org.chromium.chrome.browser.vr.WebXrVrInputTest#testWebXrGamepadReturnedWithGamepadSupport__ChromeTabbedActivity
org.chromium.chrome.browser.vr.WebXrVrInputTest#testControllerClicksRegisteredOnDaydream__ChromeTabbedActivity
org.chromium.chrome.browser.vr.WebXrVrInputTest#testControllerClicksRegisteredOnDaydream_WebXr__ChromeTabbedActivity

Looking at the device when running org.chromium.chrome.browser.vr.WebXrVrInputTest#testControllerClicksRegisteredOnDaydream__ChromeTabbedActivity, it looks like the device is entering and exiting WebVR presentation with each click of the controller, which is unexpected.