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

src/effects/SkTileImageFilter.cpp

Index: src/effects/SkTileImageFilter.cpp
diff --git a/src/effects/SkTileImageFilter.cpp b/src/effects/SkTileImageFilter.cpp
index c098bc29550a8d7a185d23eba34f2678dfdbc80d..45d0cbb3a9073608b5500a8825be0add1d1f176d 100644
--- a/src/effects/SkTileImageFilter.cpp
+++ b/src/effects/SkTileImageFilter.cpp
@@ -55,9 +55,7 @@ sk_sp<SkSpecialImage> SkTileImageFilter::onFilterImage(SkSpecialImage* source,
     }
 
     const SkIRect dstIRect = dstRect.roundOut();
-    int dstWidth = dstIRect.width();
-    int dstHeight = dstIRect.height();
-    if (!fSrcRect.width() || !fSrcRect.height() || !dstWidth || !dstHeight) {
+    if (!fSrcRect.width() || !fSrcRect.height() || !dstIRect.width() || !dstIRect.height()) {
         return nullptr;
     }
 
@@ -102,9 +100,7 @@ sk_sp<SkSpecialImage> SkTileImageFilter::onFilterImage(SkSpecialImage* source,
     SkASSERT(subset->width() == srcIRect.width());
     SkASSERT(subset->height() == srcIRect.height());
 
-    const SkImageInfo info = SkImageInfo::MakeN32(dstWidth, dstHeight, kPremul_SkAlphaType);
-
-    sk_sp<SkSpecialSurface> surf(source->makeSurface(info));
+    sk_sp<SkSpecialSurface> surf(source->makeSurface(dstIRect));
     if (!surf) {
         return nullptr;
     }