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This CL updates the UI in the chrome://settings/passswords/check and
adds to it a new weak password section.
Screenshot of Password Check page before and after changes:
https://bugs.chromium.org/p/chromium/issues/detail?id=1119752#c15

Bug: 1119752
Change-Id: I4520fc0af910ea72568b8b9fa84a41daee3ebf49
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424152Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Irina Fedorova <irfedorova@google.com>
Cr-Commit-Position: refs/heads/master@{#810203}