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This Cl fixes a race in Time Zone Resolver Manager when checking if Local State
has been initialized.

Bug: b/64065854
Change-Id: If681dc675e0219fda7c9b37307c7f205394c62fd
Reviewed-on: https://chromium-review.googlesource.com/682734
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504465}