[projects] Add field trial config for combo button and projects panel

HorizontalTabStripComboButton is required for the ProjectsPanel launch,
but since the panel launch is on pause, these will be landed as separate
experiment configs to allow us to roll out the combo button separately.

Tests with the combo button disabled will be fixed and re-enabled in
later CLs. Tests with the projects panel disabled will also be fixed and
re-enabled if that project resumes launch.

Bug: 492597848
Change-Id: I87dac7a8347e7500001447e2c4ec1243d22ad39b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7666655
Reviewed-by: Nico Weber <[email protected]>
Commit-Queue: Chase Hartsell <[email protected]>
Reviewed-by: Emily Shack <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1605578}
NOKEYCHECK=True
GitOrigin-RevId: 91fc40e030c928dac7808a9f0f7513b88002c329
1 file changed