[iOS] Fix Copied to Chrome button

The cell wasn't converted to UITableViewCell.

Bug: 894791
Change-Id: I44fdd29f4d3179eefa0d4515c4b8655bb77cd6c0
Reviewed-on: https://chromium-review.googlesource.com/c/1392960
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Yi Su <mrsuyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619424}
4 files changed