Copied  issue chromium:884721  from  issue chromium:884718 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c3763093693bd6e0b67343f63f751a12f35ba616

commit c3763093693bd6e0b67343f63f751a12f35ba616
Author: Mark Cogan <marq@google.com>
Date: Wed Sep 26 13:24:48 2018

[iOS] Remove use of IsSettingsUIRebootEnabled()

Bug:  884721 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I16512538ba9d0eb765a99eb374c83d7cdaed3a2b
Reviewed-on: https://chromium-review.googlesource.com/1245702
Commit-Queue: Mark Cogan <marq@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594296}
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/experimental_flags.h
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/experimental_flags.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/autofill/cells/autofill_edit_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/collection_view/cells/collection_view_account_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/collection_view/cells/collection_view_footer_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/autofill_credit_card_collection_view_controller.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/autofill_profile_collection_view_controller.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/BUILD.gn
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/account_signin_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/autofill_data_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/card_multiline_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/copied_to_chrome_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/copied_to_chrome_item_unittest.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/encryption_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/import_data_multiline_detail_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/passphrase_error_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/password_details_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/settings_detail_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/settings_switch_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/settings_text_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/sync_switch_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/text_and_error_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/cells/version_item.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/settings_collection_view_controller.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/settings_navigation_controller.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/settings_root_collection_view_controller.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/sync_create_passphrase_collection_view_controller.mm
[modify] https://crrev.com/c3763093693bd6e0b67343f63f751a12f35ba616/ios/chrome/browser/ui/settings/sync_encryption_passphrase_collection_view_controller.mm