Fix bug in DownloadSKPs
Fix bug in DownloadSKPs

TBR=rmistry

Slave-side script cleanup, pt 3: gs_utils

TBR=rmistry
BUG=skia:

Review URL: https://codereview.chromium.org/137463012

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