This helps make sure they have proper types (e.g. True
instead of "True" for booleans).

Also see https://chromium-review.googlesource.com/c/chromium/src/+/681854
for context.

Bug: 756688, 570091
Change-Id: I1e4d26df724e8e94cc3daba361191856f80a1b2c
Reviewed-on: https://chromium-review.googlesource.com/681705Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Paweł Hajdan Jr. <phajdan.jr@chromium.org>