Update SkMergeImageFilter to sk_sp

include/effects/SkMergeImageFilter.h

Index: include/effects/SkMergeImageFilter.h
diff --git a/include/effects/SkMergeImageFilter.h b/include/effects/SkMergeImageFilter.h
index 3bf649d97ded9c0e8412f905d6f773f955eb528f..e85cc1f97fd45a8aadd134b28f0b482a1ff9a56a 100644
--- a/include/effects/SkMergeImageFilter.h
+++ b/include/effects/SkMergeImageFilter.h
@@ -16,30 +16,51 @@ class SK_API SkMergeImageFilter : public SkImageFilter {
 public:
     ~SkMergeImageFilter() override;
 
-    static SkImageFilter* Create(SkImageFilter* first, SkImageFilter* second,
-                                 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode,
-                                 const CropRect* cropRect = NULL) {
-        SkImageFilter* inputs[2] = { first, second };
+    static sk_sp<SkImageFilter> Make(sk_sp<SkImageFilter> first, sk_sp<SkImageFilter> second,
+                                     SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode,
+                                     const CropRect* cropRect = nullptr) {
+        sk_sp<SkImageFilter> inputs[2] = { first, second };
         SkXfermode::Mode modes[2] = { mode, mode };
-        return new SkMergeImageFilter(inputs, 2, modes, cropRect);
+        return sk_sp<SkImageFilter>(new SkMergeImageFilter(inputs, 2, modes, cropRect));
     }
 
-    static SkImageFilter* Create(SkImageFilter* filters[], int count,
-                                 const SkXfermode::Mode modes[] = NULL,
-                                const CropRect* cropRect = NULL) {
-        return new SkMergeImageFilter(filters, count, modes, cropRect);
+    static sk_sp<SkImageFilter> Make(sk_sp<SkImageFilter> filters[],
+                                     int count,
+                                     const SkXfermode::Mode modes[] = nullptr,
+                                     const CropRect* cropRect = nullptr) {
+        return sk_sp<SkImageFilter>(new SkMergeImageFilter(filters, count, modes, cropRect));
     }
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMergeImageFilter)
 
+#ifdef SK_SUPPORT_LEGACY_IMAGEFILTER_PTR
+    static SkImageFilter* Create(SkImageFilter* first, SkImageFilter* second,
+                                 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode,
+                                 const CropRect* cropRect = nullptr) {
+        return Make(sk_ref_sp<SkImageFilter>(first),
+                    sk_ref_sp<SkImageFilter>(second),
+                    mode, cropRect).release();
+    }
+
+    static SkImageFilter* Create(SkImageFilter* filters[], int count,
+                                 const SkXfermode::Mode modes[] = nullptr,
+                                 const CropRect* cropRect = nullptr) {
+        SkAutoTDeleteArray<sk_sp<SkImageFilter>> temp(new sk_sp<SkImageFilter>[count]);
+        for (int i = 0; i < count; ++i) {
+            temp[i] = sk_ref_sp<SkImageFilter>(filters[i]);
+        }
+        return Make(temp.get(), count, modes, cropRect).release();
+    }
+#endif
+
 protected:
     void flatten(SkWriteBuffer&) const override;
     sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
                                         SkIPoint* offset) const override;
 
 private:
-    SkMergeImageFilter(SkImageFilter* filters[], int count, const SkXfermode::Mode modes[],
+    SkMergeImageFilter(sk_sp<SkImageFilter> filters[], int count, const SkXfermode::Mode modes[],
                        const CropRect* cropRect);
 
     uint8_t*    fModes; // SkXfermode::Mode