Useful when passing information to a subcommand via a temporary file.

Bug: 1051631
Change-Id: I0b8deda921effd24a37109544e1e7ca22e00ba4e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2068942Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>