A11y image labeling: reenable feature by default.

Now that we've merged the logic to default-disable this feature in M75
(crrev.com/c/1607711), we will reenable this feature on trunk for dev / canary
users.

Change-Id: If250487c206c97cbe7eb6cece72fb5f9d3897e06
Bug: 945228
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617056
Reviewed-by: Jia Meng <jiameng@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Michael Martis <martis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661263}
1 file changed