In staging run #456, http://cr-buildbucket.appspot.com/build/8677520959319067649, the platform view tests failed with golden mismatch. The result images were just a black screen. This implies a platform view composition failure.

Currently, the driver tests wait for composition to complete by just waiting for the next three flutter frames. But this isn't very robust. This issue recommends exploring more robust methods of waiting for composition to complete