Fix clear rects in SkGpuBlurUtils

Change-Id: Iab1d7934248d8e0acc13311a8b5476471d4e9ebc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290758
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
1 file changed