Swap SkGpuBlurUtils over to using SkIRects

src/effects/SkBlurImageFilter.cpp

Index: src/effects/SkBlurImageFilter.cpp
diff --git a/src/effects/SkBlurImageFilter.cpp b/src/effects/SkBlurImageFilter.cpp
index 0625d37a42a18c3b16539ebb11752add214a9b8e..39b58b856e730ba25d01d36d05aa613de7c81edb 100644
--- a/src/effects/SkBlurImageFilter.cpp
+++ b/src/effects/SkBlurImageFilter.cpp
@@ -120,13 +120,12 @@ sk_sp<SkSpecialImage> SkBlurImageFilter::onFilterImage(SkSpecialImage* source,
         offset->fY = dstBounds.fTop;
         inputBounds.offset(-inputOffset);
         dstBounds.offset(-inputOffset);
-        SkRect inputBoundsF(SkRect::Make(inputBounds));
         sk_sp<GrDrawContext> drawContext(SkGpuBlurUtils::GaussianBlur(
                                                                   context,
                                                                   inputTexture.get(),
                                                                   source->props().isGammaCorrect(),
-                                                                  SkRect::Make(dstBounds),
-                                                                  &inputBoundsF,
+                                                                  dstBounds,
+                                                                  &inputBounds,
                                                                   sigma.x(),
                                                                   sigma.y()));
         if (!drawContext) {