GitLab

When sharing a tab that does not have a URL, host or tab title, the tab
sharing infobar should simple display "Sharing a tab". Add message
resource for this case.

Bug: 1011379
Change-Id: Ibe67b32f3eb55695067c534552559cec8b0f19e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1841851Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702932}