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This CL moves some of the features behind 'kProfilesUiRevamp' to either
'kNewProfilePicker' or 'kDiceWebSigninInterceptionFeature' feature
flags.

Fixed: 1151943
Change-Id: I00dee6bc2085d757da90522f731569a8898b7a35
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2555059
Commit-Queue: Monica Basta <msalama@chromium.org>
Auto-Submit: Monica Basta <msalama@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830537}