tree b5ce4be8f70d3ee7623d6e3141b7113864ac689e
parent 0e9a3072c251b6aea7ffa9bda60d3cf5bd7e16b3
author Eric Boren <borenet@google.com> 1565709341 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1565710147 +0000

[exec] Respect context.Done()

- Use context.WithTimeout() to implement timeouts.
- Kill the subprocess if the context was canceled, either due to the
  configured timeout or parent context cancellation.
- Add util.NonCancelableContext() which wraps a parent context but
  ignores parent.Done() et al.

Change-Id: I6102961c3e0446cc123a4d1b61a87441f51b3667
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/234036
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>