add this to PRESUBMIT.py in the chromium tree later).
- Update cpplint.py to the latest version from the style guide.

Review URL: http://codereview.chromium.org/395022

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@32180 0039d316-1c4b-4281-b951-d872f2087c98