Update DisplacementMapEffect to sk_sp

include/effects/SkDisplacementMapEffect.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDisplacementMapEffect_DEFINED
 #define SkDisplacementMapEffect_DEFINED
 
 #include "SkImageFilter.h"
 
 class SK_API SkDisplacementMapEffect : public SkImageFilter {
 public:
     enum ChannelSelectorType {
         kUnknown_ChannelSelectorType,
         kR_ChannelSelectorType,
         kG_ChannelSelectorType,
         kB_ChannelSelectorType,
         kA_ChannelSelectorType
     };
 
-    ~SkDisplacementMapEffect();
+    ~SkDisplacementMapEffect() override;
 
-    static SkImageFilter* Create(ChannelSelectorType xChannelSelector,
-                                 ChannelSelectorType yChannelSelector,
-                                 SkScalar scale, SkImageFilter* displacement,
-                                 SkImageFilter* color = NULL,
-                                 const CropRect* cropRect = NULL);
+    static sk_sp<SkImageFilter> Make(ChannelSelectorType xChannelSelector,
+                                     ChannelSelectorType yChannelSelector,
+                                     SkScalar scale,
+                                     sk_sp<SkImageFilter> displacement,
+                                     sk_sp<SkImageFilter> color,
+                                     const CropRect* cropRect = nullptr);
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect)
 
     SkRect computeFastBounds(const SkRect& src) const override;
 
     virtual SkIRect onFilterBounds(const SkIRect& src, const SkMatrix&,
                                    MapDirection) const override;
     SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix&, MapDirection) const override;
 
     SK_TO_STRING_OVERRIDE()
 
+#ifdef SK_SUPPORT_LEGACY_IMAGEFILTER_PTR
+    static SkImageFilter* Create(ChannelSelectorType xChannelSelector,
+                                 ChannelSelectorType yChannelSelector,
+                                 SkScalar scale, SkImageFilter* displacement,
+                                 SkImageFilter* color = nullptr,
+                                 const CropRect* cropRect = nullptr) {
+        return Make(xChannelSelector, yChannelSelector, scale, 
+                    sk_ref_sp<SkImageFilter>(displacement),
+                    sk_ref_sp<SkImageFilter>(color),
+                    cropRect).release();
+    }
+#endif
+
 protected:
     sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
                                         SkIPoint* offset) const override;
 
     SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,
                             ChannelSelectorType yChannelSelector,
-                            SkScalar scale, SkImageFilter* inputs[2],
+                            SkScalar scale, sk_sp<SkImageFilter> inputs[2],
                             const CropRect* cropRect);
     void flatten(SkWriteBuffer&) const override;
 
 private:
     ChannelSelectorType fXChannelSelector;
     ChannelSelectorType fYChannelSelector;
     SkScalar fScale;
     typedef SkImageFilter INHERITED;
     const SkImageFilter* getDisplacementInput() const { return getInput(0); }
     const SkImageFilter* getColorInput() const { return getInput(1); }
 };
 
 #endif