gpylint doesn't like the use of "type" as a variable name (redefining a
builtin) - change the signature of the method to use the exc_ prefix
like sys.exc_*. The variables are not actually used anyway.

BUG=


Review URL: https://chromiumcodereview.appspot.com/12255048

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@182722 0039d316-1c4b-4281-b951-d872f2087c98