Add retries to chromium analysis
Add retries to chromium analysis

BUG=skia:5316
TBR=benjaminwagner

Review-Url: https://codereview.chromium.org/2045113003

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