This caused compatibility issues, because the executor script (presubmit_support.py) asks the parser for Python 3-style print functions and inherits this to the presubmit scripts it runs, of which some still use the old style statements.

Bug: 961783
Change-Id: I545d778991a53f484bce6c7e29089e0484dc19ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1605917
Auto-Submit: Raul Tambre <raul@tambre.ee>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>