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This CL adds the logic to clear the browsing data from the web
implementation of the BrowsingDataRemover.

Bug: 619783
Change-Id: Ia4771a61a8482adf296816eed54dafb5498de932
Reviewed-on: https://chromium-review.googlesource.com/c/1477831
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Mohammad Refaat <mrefaat@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635470}