Update SadTabTabHelper to work with SadTabCoordinator.

SadTabTabHelper now calls sadTabTabHelperDidHide: and
sadTabTabHelper:didShowForRepeatedFailure:

Bug: 901563
Change-Id: If2b75702c951c247d44368b681ce360bbb6464d5
Reviewed-on: https://chromium-review.googlesource.com/c/1327167
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606854}
3 files changed