Switch a bunch of tests to use DEF_SIMPLE_GM.

Should be no user- or test-visible changes.

BUG=skia:

Change-Id: I6499dc978a41fee344b847c118f84227271561c5
Reviewed-on: https://skia-review.googlesource.com/6906
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Stephan White <senorblanco@chromium.org>
5 files changed