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When a synchronous profile load is happening (e.g. after chrome restart
on Chrome OS), make sure to invoke UserCloudPolicyManagerChromeOS's
OnStoreLoaded handling.
This is also the place where user affilitaion is determined.

BUG=810013
TEST=browser_tests --gtest_filter=*UserAffiliation*

Change-Id: Ib4a4b1ad3e61eba637f527dfa89cb5cd1fd2159b
Reviewed-on: https://chromium-review.googlesource.com/908565Reviewed-by: Sergey Poromov <poromov@chromium.org>
Reviewed-by: Drew Wilson <atwilson@chromium.org>
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Pavol Marko <pmarko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537267}