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Reland of https://chromium-review.googlesource.com/c/chromium/src/+/2450409
In this CL removed changes to PasswordViewControllerTestCase which
caused flakiness.

This change rewrites Passwords tests with new Password Details screen.
Obsolete tests are deleted. Fixed flakiness for
testSearchAndDeleteAllPasswords.

Bug: 1075494
Bug: 1129441
Change-Id: I36fe982d496f641ce1855ac34c7d816a30e3fcad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2456609Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Viktor Semeniuk <vsemeniuk@google.com>
Cr-Commit-Position: refs/heads/master@{#815935}