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State is simplified to {kInactive, kActive} for now but will need more
granularity later on.

Bug: b:78913434
Change-Id: I558c4f2c9b2b266a621a36fc67ecd5af1d28eed6
Reviewed-on: https://chromium-review.googlesource.com/1036729Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#555283}