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This change is needed to ensure that fake behaves the same as real
client and we can use it in the unit test to validate that arc
instance stopped is not fired on unrelated instance.

BUG=b:164816080
TEST=cq

Change-Id: Ice5e588b81231ac87b78dafd25188d6629b38bd5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2469231
Auto-Submit: Muhammad Hasan Khan <mhasank@chromium.org>
Commit-Queue: Muhammad Hasan Khan <mhasank@chromium.org>
Reviewed-by: Ryo Hashimoto <hashimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816907}