GitLab

1) Uses the proper title for tab grid tab cells.
2) Properly sets snapshot image. It was previously 
setting the button's image rather than the imageView.

Bug: 686770
Change-Id: I1f400f9b543528355f3014f3e1503e50166b33e9
Reviewed-on: https://chromium-review.googlesource.com/564346
Commit-Queue: Ed Chin <edchin@chromium.org>
Reviewed-by: Ed Chin <edchin@chromium.org>
Reviewed-by: Jean-François Geyelin <jif@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485449}