Remove static initializer of GrProcessorSet::gEmpty

Change-Id: I9d4cb34c54458ad42a413f251d1018217de26b90
Reviewed-on: https://skia-review.googlesource.com/17206
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed