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This change adds basic UI for password check page. Change includes
number of compromised credentials, last refresh time, and button to run
password check manually.

Bug: 1047726
Change-Id: If7a9f7ad2c35ccd070e090514d38d313a22d6d6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2068602Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Viktor Semeniuk <vsemeniuk@google.com>
Cr-Commit-Position: refs/heads/master@{#744616}