Throw error for unicode URLs in .gclient
Throw error for unicode URLs in .gclient

This is no longer supported to make the move to Python 3 easier.
Only some very old/weird user configurations may have this, so this provides a clear actionable error message.

Bug: 942522
Change-Id: I88106089c53d84b19c4f77b7e60fe251082122d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1539957
Reviewed-by: Dirk Pranke <6693ee08b084bb2ffa767f664c99b689395e0e4b@chromium.org>
Commit-Queue: Raul Tambre <8b52b6b714585648fd300da0dbc0fa0678553280@tambre.ee>

CoherentLabs/depot_tools,CoherentLabs/depot_tools