The check "window.internals && internals.runtimeFlags.orientationEventEnabled" is failing in:
screen_orientation/window-orientationchange-event-subframe.html
screen_orientation/window-orientationchange-event.html

The tests are passing in run-webkit-tests despite the precondition failing.

Test output:
CONSOLE ERROR: line 82: This test requires window.internals and the orientationchange event to be enabled.
This is a testharness.js-based test.
PASS Test that window's orientationchange event is fired when the orientation changes. 
PASS Test that window's orientationchange event is not fired when the orientation does not change. 
Harness: the test ran to completion.

I think OrientationEvent in RuntimeEnabledFeatures.in should be set to status=test.