GitLab

Follow adapted version of: crbug/1051776
as migration plan:
Step 1: (This CL)
- add .gitignore entry for new path
- add entry to src/DEPS for HelpApp
- point references to app to the new entry

Step 2: (CL internal: https://chrome-internal-review.googlesource.com/c/chrome/src-internal/+/2967280)
- remove entry for app in src-internal/DEPS

Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Change-Id: Iea0ccd46670f91824fc4c95ceb630c4bc7af791f
Bug: 1080474
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2182702
Commit-Queue: Jose Magana <jomag@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Rachel Carpenter <carpenterr@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#768559}