Add the notion of an OS category to the os enum.

This reduces the maintenance burden of maintaining OS-specific defaults
(e.g. builderless) and enables simplifying a proposed change that goma
wishes to make for their builders.

Change-Id: Icc68cfcbbf536d28e3e0df6d7eedfb85266a4db5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1995464
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Aaron Gable <agable@chromium.org>
Commit-Queue: Garrett Beaty <gbeaty@chromium.org>
Cr-Commit-Position: refs/heads/master@{#730914}
1 file changed