[gold] MediumTest->LargeTest due to timeout.
[gold] MediumTest->LargeTest due to timeout.

BUG=skia:

Change-Id: I105af733bc01f03f523f3a8915f5df2f9aa22dff
Reviewed-on: https://skia-review.googlesource.com/5735
Reviewed-by: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>
Commit-Queue: Ben Wagner <3ef7217be91069877d94f7907ce5479000772cd3@google.com>

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