Got the following error after trying to clone/sync chromium sources behing a corporate proxy/certificate (or something similar):
(venv) (develenv) ➜ chromium git:(master) ✗ gclient sync
Syncing projects: 100% (98/98), done.
Running hooks: 18% (14/75) binutils
________ running '/home/nickp/sandbox/chromium/venv/bin/python src/third_party/binutils/download.py' in '/home/nickp/sandbox/chromium'
NOTICE: You have PROXY values set in your environment, but gsutil in depot_tools does not (yet) obey them.