GitLab

We never did this cleanup after shipping MacViews. This change removes
all the remaining uses of it (blessedly only in tests) and removes the
namespace altogether.

Bug: 845389
Change-Id: Icb52064f8ad7a8c66030c941ba1cdf298a1ae73a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1895654
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712189}