This just a copy of cpplint.py from upstream [1].

[1] https://code.google.com/p/google-styleguide/source/detail?spec=svn141&r=141

The change in gclient_scm.py is to address a presubmit check error
which was introduced by https://codereview.chromium.org/227163002
"print_func" parameter was being passed to a function instead of
the object constructor.

BUG=None
NOTRY=True

Change-Id: I4dca890d5f02957ddae33c4bd4269fd37758be3d

Review URL: https://codereview.chromium.org/777533005

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@293276 0039d316-1c4b-4281-b951-d872f2087c98