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This CL deletes the SODA components on browser start up if the Live
Caption feature was disabled for at least 30 days.

Expected edge cases:
 - The duration could be longer than 30 days if the browser is
   restarted infrequently.
 - Other profiles may have the feature still enabled at the time of
   deletion. The SODA components should still be deleted if those
   profiles have not registered the SODA component recently.

Bug: 1143753
Change-Id: Id95d9fb7cb822b7c0664833291bf2bd5cfcc1a8f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2515209
Commit-Queue: Evan Liu <evliu@google.com>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824225}