remove racy tests, as they assume the cache can't be purged behind their back

remove racy tests, as they assume the cache can't be purged behind their back

If I explicitly purge the resource-cache after every DM, these tests fail (sporadically)
.
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/2ed7d50307d2c059b1c0a94747b3e1b9d49491e7

[reed1, 2015-09-17 20:20:13]

reed@google.com changed reviewers:
+ fmalita@chromium.org

[reed1, 2015-09-17 20:20:13]

ptal

[f(malita), 2015-09-17 20:20:50]

The CQ bit was checked by fmalita@chromium.org

[f(malita), 2015-09-17 20:20:51]

lgtm

[reed1, 2015-09-17 20:20:52]

The CQ bit was checked by reed@google.com to run a CQ dry run

[reed1, 2015-09-17 20:20:59]

The CQ bit was unchecked by reed@google.com

[reed1, 2015-09-17 20:21:04]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2015-09-17 20:21:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1350143002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1350143002/1

[commit-bot: I haz the power, 2015-09-17 20:27:49]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/2ed7d50307d2c059b1c0a94747b3e1b9d49491e7