gclient normally runs hooks in a pseudo terminal which has no
sense of the terminal size. If we want hooks to be able to change
what they output based on the terminal size, we have to explicitly
propagate the terminal size info down through the subprocess
environment.
Change-Id: I08f7c48ef78ea4eb9f5b791abb2a7e5ef8870050
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6161596
Reviewed-by: Scott Lee <ddoman@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@google.com>
