Reland of http://crrev.com/1689633002#ps20001 without breaking other
repos by means of keeping breakpad.py importable, but otherwise a no-op.

R=maruel@chromium.org
BUG=585837

Review URL: https://codereview.chromium.org/1687923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298731 0039d316-1c4b-4281-b951-d872f2087c98