GitLab

* "down" property does not have any effect on outer container
* with new material design, all dialogs have same size, no
  need for special handling

Bug: 999058
Change-Id: I670a4e885691deca606afa395bd8f5b961303aab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1792862
Commit-Queue: Denis Kuznetsov <antrim@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699393}