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This change is to enable the new-clear-browsing-data-ui flag.

The new Clear Browsing Data dialog adds the time range selection functionality
and shows browsing data volume details for each data type.
Launch Bug: crbug/627147
Screenshots: https://drive.google.com/open?id=1q1zJzB1abRsY1zCD4rLewvMxCnMr8WGf

Bug: 627147
Change-Id: If2e16f4697a7aac2308a430c48880eb2f0c58c19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1624906Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662278}