Don't use "make restart" in launch_slaves.py, fix lint warnings
Don't use "make restart" in launch_slaves.py, fix lint warnings

(SkipBuildbotRuns)
Review URL: https://codereview.chromium.org/13770004

git-svn-id: 32fc27f4dcfb6c0385cd9719852b95fe6680452d@8556 2bbb7eff-a529-9590-31e7-b0007b416f81

google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot