Restore a line accidentally removed in cl/339791770, leading to a few flakes
Restore a line accidentally removed in cl/339791770, leading to a few flakes

I started to see some flakes in CoreAllocatorTest and AbstractArcHost test.

PiperOrigin-RevId: 339799381

PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs