disable assert until I can understand why it fails in cc_unittests

BUG=skia:

Change-Id: I475b7b43e17f17f8f2a50e93ae0ce8a5b918b041
NOTRY=True
Reviewed-on: https://skia-review.googlesource.com/9547
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed