Quick run is only set when the -q flag is passed. It is not set to 0 by
other flags because only Chromium has Quick run and there are other
depot_tools users. We rely on the CQ to set the flag back to 0.

Bug: 1192827
Change-Id: I3310c9f005343f7d3eea56eaad5f19c7ba751921
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2927818
Commit-Queue: Gregory Guterman <guterman@google.com>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>