Cannot use super() with buildbot classes.
Cannot use super() with buildbot classes.

TBR=iannucci@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/482663002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@290215 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build