This will remove a Python 2.7 dependency from the tests.

TBR=agable@chromium.org,iannucci@chromium.org

Review URL: https://codereview.chromium.org/399223002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@283834 0039d316-1c4b-4281-b951-d872f2087c98