Fix write-only storage stack lifecycle.

PolymerLabs / arcs

Arcs

BSD 3-Clause "New" or "Revised" License

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Fix write-only storage stack lifecycle. #7108

Closed copybara-service[bot] closed 3 years ago

copybara-service[bot] commented 3 years ago

Fix write-only storage stack lifecycle.

Fixes two problems: 1) Only Database should get WriteOnly stack (not RamDisk/Volatile) 2) StorageEvent.READY no longer immediately delivered, but dispatched after maybeInitiateSync() 3) #2 exposed a slight concurrency issue, so added a toSet() call when iterating a set