Increase the default value of dc-extra-screenshots to try to reduce noise
Increase the default value of dc-extra-screenshots to try to reduce noise

Bug: skia:6957
Change-Id: Id910fa35d6ec0e6cb634ad8282879896186b2089
Reviewed-on: https://skia-review.googlesource.com/40081
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Reviewed-by: Ben Wagner <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@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