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This CL fixes the tests so they can run with the fullscreen refactoring
flags enabled by default.
It also fixes an issue with the ntp_util functions.

Bug:none

Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: Iec703052548d3f7c024d47c30d7a429162144d85
Reviewed-on: https://chromium-review.googlesource.com/c/1261523Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600737}