GitLab

- Fixed the Copy Link test that wouldn't pass on devices.
- Reused helper function for Open In New Tab and Incognito actions.
- Added test coverage the new context menu actions:
  - Share
  - Delete

Bug: 1131831,1067812
Change-Id: Ic5b6e4487aea4bd7c972f5ca8caf6632e4c6dbd8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2435329Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Commit-Queue: Sebastien Lalancette <seblalancette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811680}