Fix up shadows in raster.

* Re-enable shadow blurs for raster circles and rrects
* Fix up the tessellation as much as possible to remove skinny triangles

Bug: skia:6425
Change-Id: I6548055084bc8596a052bcd3cec852766e084ba2
Reviewed-on: https://skia-review.googlesource.com/14943
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
2 files changed