This makes this file even easier to read and python 2.6 support is not needed
anymore.

R=iannucci@chromium.org
BUG=

Review URL: https://codereview.chromium.org/238233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@265799 0039d316-1c4b-4281-b951-d872f2087c98