The function we use with gclient_utils has moved to gclient_paths.
However, I am not sure gclient_utils is used by others or not.

Additional change:
- sorted testMembersChanged members for ease of understanding what is
  different.

Bug: 939959
Change-Id: I8b822e26afc73b39d2a33c5e07779c9c14cbd394
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1521850
Commit-Queue: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Fumitoshi Ukai <ukai@chromium.org>