GitLab

WebStateObserver::NavigationItemsPruned is part of the legacy navigation
and is already cleaned up in https://crrev.com/c/1953765. This CL
cleans up remaining usage in //ios.

Bug: 1029306
Change-Id: I5e96c868f44100f28a13b7cba2ba797b8c938644
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1960449Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723493}