[iOS][MF] Make sure the gray line is hidden when appears

View was being hidden on prepare to reuse only, causing it to be shown
the first time the cell was used.

Bug: 845472, 911148
Change-Id: Ic59d5de5f476c7e499d40a244ef1291e4ccd3bfa
Reviewed-on: https://chromium-review.googlesource.com/c/1358447
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#613128}(cherry picked from commit 02ec4e9cfb45e7781692e6dff2941875cc4d913b)
Reviewed-on: https://chromium-review.googlesource.com/c/1363273
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/branch-heads/3626@{#76}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}
1 file changed