Update style of empty manage-passwords dialog.

Replaces the dialog showing "Saved passwords for this site:" as title
alongside "No passwords saved." in the body. Instead this now shows only
"No passwords saved for this site" as title.

Bug: chromium:654115
Change-Id: Id8c340991fd22a5406112788ddf24e04b79487b5
Reviewed-on: https://chromium-review.googlesource.com/847908
Commit-Queue: Peter Boström <pbos@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532287}
7 files changed