Well, the funny thing is that it doesn't find the bug but the framework is
already good enough as-is to be worth checked-in, so the next commit can show
the relevant difference.

R=dpranke@chromium.org
BUG=60725
TEST=

Review URL: http://codereview.chromium.org/7773001

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@98869 0039d316-1c4b-4281-b951-d872f2087c98