Don't clip non-AA quads

Minor optimization. When non-AA, the quad corners are never moved so it
won't go through the math that requires w > 0. The GPU is perfectly
capable of clipping to w > 0, except that it produces a non-AA edge;
for AA quads this is a problem, but not so when the draw was non-AA.

Change-Id: Ibf77b678f5b3b90a5a88fb3670a31cd12ff3775f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/269762
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
2 files changed