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

src/effects/SkMergeImageFilter.cpp

Index: src/effects/SkMergeImageFilter.cpp
diff --git a/src/effects/SkMergeImageFilter.cpp b/src/effects/SkMergeImageFilter.cpp
index cc7e336a3dd99ab13513aaec30687b1bd39a7f29..2dd02ee529ce283b7ecf16a0963b57d106a141ea 100755
--- a/src/effects/SkMergeImageFilter.cpp
+++ b/src/effects/SkMergeImageFilter.cpp
@@ -113,7 +113,10 @@
     const int x0 = bounds.left();
     const int y0 = bounds.top();
 
-    sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size()));
+    SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(),
+                                            kPremul_SkAlphaType);
+
+    sk_sp<SkSpecialSurface> surf(source->makeSurface(info));
     if (!surf) {
         return nullptr;
     }