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This CL adds a coordinator to the privacy table view controller.
Before that the controller was also the coordinator.

Bug: 1064961
Change-Id: I781924cc24b4c8aae0e957e1e504e95ece8953b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2120423
Commit-Queue: Ewann Pellé <ewannpv@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#754849}