This is a testharness.js-based test.
[FAIL] XRViewport attributes are valid - webgl
promise_test: Unhandled rejection with value: object "TypeError: Cannot read properties of null (reading 'makeXRCompatible')"
[FAIL] XRViewport attributes are valid - webgl2
promise_test: Unhandled rejection with value: object "TypeError: Cannot read properties of null (reading 'makeXRCompatible')"
[FAIL] XRViewport attributes are valid with secondary views requested - webgl
promise_test: Unhandled rejection with value: object "TypeError: Cannot read properties of null (reading 'makeXRCompatible')"
[FAIL] XRViewport attributes are valid with secondary views requested - webgl2
promise_test: Unhandled rejection with value: object "TypeError: Cannot read properties of null (reading 'makeXRCompatible')"
Harness: the test ran to completion.