GitLab

- Added the required strings for the clipboard
warning bubble.
- Created the warning bubble which should be
shown before paste.

Bug: 1167228
Change-Id: If4563426fff95ab74722e41283c7184b2a6929c2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2637639
Commit-Queue: Aya Elsayed <ayaelattar@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846023}