Valentin Shergin 294d91b30a Fabric: ShadowTree is now stored as unique_ptr instead of shared_ptr
Summary:
@public
Now it's clear that we don't need to store/handle ShadowTree objects as `shared_ptr`s; Scheduler should own it. This diff changes that to using unique_ptr and removes a base class of ShadowTree.

Reviewed By: mdvacca

Differential Revision: D9403567

fbshipit-source-id: 6e411714b632a04233fd5b25c8ab7cdd260105fd
2018-09-03 23:04:20 -07:00
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2018-08-30 13:04:50 -07:00