[iOS] Fix SadTabTabHelper compilation.

Bug: 815085
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ib54f0a0c92da1ac3cdff7ad9c510ed60e41075e2
Reviewed-on: https://chromium-review.googlesource.com/934941
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#568}
Cr-Branched-From: bc084a8b5afa3744a74927344e304c02ae54189f-refs/heads/master@{#530369}
1 file changed