GitLab

Screenshots here:
https://drive.google.com/drive/folders/1ya-W3P0fFftqwD8MVoc1FaGcOJucjawm?usp=sharing

Video record:
1, single start surface
https://drive.google.com/a/google.com/file/d/1TsAyE5lzz5OyaluVWFsjOnoY7RFMit7d/view?usp=sharing
2, tasks only start surface
https://drive.google.com/a/google.com/file/d/1Jij-EpFKZOFWhf5BV79yP97JSWgF4QxA/view?usp=sharing
3, start surface disabled
https://drive.google.com/a/google.com/file/d/15AlCELYCu_FgdifcO9NyGp5eCVQzNzBG/view?usp=sharing

Bug: 982018
Change-Id: I3b3bb7daa9eb58ab9cd804d58c376f0c9be9edfe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1992272
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Reviewed-by: Patrick Noland <pnoland@chromium.org>
Reviewed-by: Pavel Yatsuk <pavely@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Reviewed-by: Ganggui Tang <gogerald@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733785}