Flutter iOS add-to-app not rendering #71431
Description
Running https://github.com/flutter/samples/tree/master/add_to_app/ios_fullscreen with a local engine built from ToT no longer renders.
2020-11-30 11:49:02.775003-0800 IOSFullScreen[5785:4943139] Metal API Validation Enabled
2020-11-30 11:49:10.007574-0800 IOSFullScreen[5785:4943381] [VERBOSE-2:gpu_surface_metal.mm(96)] Unable to obtain a metal drawable.
2020-11-30 11:49:10.009250-0800 IOSFullScreen[5785:4943381] [VERBOSE-2:gpu_surface_metal.mm(89)] Canvas not available.
May be related to flutter/engine#22611?
@gaaclarke I'm out in the afternoon, could you take a look to see if we need to revert anything?