Make --use-angle about:flags entry non-expiring.

This is used by relatively few customers, so it doesn't seem worth the
engineering effort of promoting it to a chrome://settings entry.
However, the persistence of the setting is needed for these customers.

Bug: 932846
Change-Id: Icbd20991f9be14089fc6ab24c4549329e2f54451
Reviewed-on: https://chromium-review.googlesource.com/c/1477939
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633444}
1 file changed