Since python2 tempfile does not have TemporaryDirectory, we need to either use temporary_directory in gclient_utils or implement it by ourselves.  If we chose latter, we also need to implement rmtree for Windows.  Considering that, I suppose using gclient_utils should be much easier.

Bug: 939959
Change-Id: Ife21a2bc297ac61a4c1940b06df937c293961ae7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1524815Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Auto-Submit: Yoshisato Yanagisawa <yyanagisawa@chromium.org>