Create special surfaces according to original device (not always in N32)

src/core/SkMatrixImageFilter.cpp

Index: src/core/SkMatrixImageFilter.cpp
diff --git a/src/core/SkMatrixImageFilter.cpp b/src/core/SkMatrixImageFilter.cpp
index 2e827d82a660bd16f2ce79a1291222955085d802..7fd41786803a427e4d1aca8b107b46a0907bb886 100644
--- a/src/core/SkMatrixImageFilter.cpp
+++ b/src/core/SkMatrixImageFilter.cpp
@@ -70,9 +70,7 @@ sk_sp<SkSpecialImage> SkMatrixImageFilter::onFilterImage(SkSpecialImage* source,
     SkIRect dstBounds;
     dstRect.roundOut(&dstBounds);
 
-    const SkImageInfo info = SkImageInfo::MakeN32Premul(dstBounds.width(), dstBounds.height());
-
-    sk_sp<SkSpecialSurface> surf(input->makeSurface(info));
+    sk_sp<SkSpecialSurface> surf(input->makeSurface(dstBounds));
     if (!surf) {
         return nullptr;
     }