Update DropShadowImageFilter to sk_sp

src/effects/SkDropShadowImageFilter.cpp

Index: src/effects/SkDropShadowImageFilter.cpp
diff --git a/src/effects/SkDropShadowImageFilter.cpp b/src/effects/SkDropShadowImageFilter.cpp
index 9cacad5513956f35774460cdfe25f486c0632e3f..92e7e2c096b1bd1525f87930f21b1b8833c6d294 100644
--- a/src/effects/SkDropShadowImageFilter.cpp
+++ b/src/effects/SkDropShadowImageFilter.cpp
@@ -16,9 +16,9 @@
 
 SkDropShadowImageFilter::SkDropShadowImageFilter(SkScalar dx, SkScalar dy,
                                                  SkScalar sigmaX, SkScalar sigmaY, SkColor color,
-                                                 ShadowMode shadowMode, SkImageFilter* input,
+                                                 ShadowMode shadowMode, sk_sp<SkImageFilter> input,
                                                  const CropRect* cropRect)
-    : INHERITED(1, &input, cropRect)
+    : INHERITED(&input, 1, cropRect)
     , fDx(dx)
     , fDy(dy)
     , fSigmaX(sigmaX)
@@ -37,8 +37,7 @@ sk_sp<SkFlattenable> SkDropShadowImageFilter::CreateProc(SkReadBuffer& buffer) {
     ShadowMode shadowMode = buffer.isVersionLT(SkReadBuffer::kDropShadowMode_Version) ?
                             kDrawShadowAndForeground_ShadowMode :
                             static_cast<ShadowMode>(buffer.readInt());
-    return sk_sp<SkFlattenable>(Create(dx, dy, sigmaX, sigmaY, color, shadowMode,
-                                       common.getInput(0).get(), &common.cropRect()));
+    return Make(dx, dy, sigmaX, sigmaY, color, shadowMode, common.getInput(0), &common.cropRect());
 }
 
 void SkDropShadowImageFilter::flatten(SkWriteBuffer& buffer) const {