Reenable write pixels tests

Change-Id: I05580d3f51b83922e33e99e80f1b6a84cc7babf6
Reviewed-on: https://skia-review.googlesource.com/112201
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed