GitLab

Since presenter belongs to UI, let's move it to Ash at this moment,
so that future CLs will be smaller.

Bug: 733662
Change-Id: I30809e34bb96406516fcdcefb27e29a440634bf9
Reviewed-on: https://chromium-review.googlesource.com/953092Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Jiaquan He <hejq@google.com>
Cr-Commit-Position: refs/heads/master@{#541654}