GitLab

All the calls are protected by gclient conditionals now, so the flags
are no longer needed.

Mostly no functional change, except one: The Windows orderfiles hook now
runs on non-Windows hosts when targeting Windows.

Bug: 495204
Change-Id: I549409dc945b7ecf0fe060908923834dbf0cf0a3
Reviewed-on: https://chromium-review.googlesource.com/723922Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509671}