GitLab

Moves the shortcuts experiment flag from iOS-only list to omnibox flags,
and disables ZeroSuggest provider when it's on.

Bug: 884687
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: Iaa709a78b0ae0a5862edec457ec0f2555e45dced
Reviewed-on: https://chromium-review.googlesource.com/1233454Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595767}