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This CL introduces a logic to block trigering future Save Password
messages for the current site. This logic is similar to "Never button"
in Save Password infobar.

For M88 Save Password message shows a menu with a single "Never" item.
In the future we will introduce a modal dialog with other options.

BUG=1160393
R=twellington@chromium.org

Change-Id: Idecfb30827b123197a5ad5af06433e6a96dfad2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2599118
Commit-Queue: Pavel Yatsuk <pavely@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839045}