Make GrShape recognize horizontal/vertical dashed lines with 0 off intervals as rrects.

Change-Id: Ic29b41911e0185d36093d5352f4494709e8124ba
Reviewed-on: https://skia-review.googlesource.com/88428
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
4 files changed