GitLab

- Start Sharing process at start discovery/adveritisng
- Changed NearbyProcessManager::GetInstance to return pointer for easy
  injection in testing

Bug: 1076008
Change-Id: I33f8d5147b30c4f9e22e778991c17b2c2c3be49d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2308149Reviewed-by: Alex Gough <ajgo@chromium.org>
Reviewed-by: Richard Knoll <knollr@chromium.org>
Commit-Queue: Alex Chau <alexchau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792049}