Switch SkDisplacementImageFilter over to new onFilterImage interface

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"
-#include "SkBitmap.h"
 
 class SK_API SkDisplacementMapEffect : public SkImageFilter {
 public:
     enum ChannelSelectorType {
         kUnknown_ChannelSelectorType,
         kR_ChannelSelectorType,
         kG_ChannelSelectorType,
         kB_ChannelSelectorType,
         kA_ChannelSelectorType
     };
 
     ~SkDisplacementMapEffect();
 
     static SkImageFilter* Create(ChannelSelectorType xChannelSelector,
                                  ChannelSelectorType yChannelSelector,
                                  SkScalar scale, SkImageFilter* displacement,
                                  SkImageFilter* color = NULL,
                                  const CropRect* cropRect = NULL);
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect)
 
-    bool onFilterImageDeprecated(Proxy* proxy,
-                                 const SkBitmap& src,
-                                 const Context& ctx,
-                                 SkBitmap* dst,
-                                 SkIPoint* offset) const override;
     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;
 
-#if SK_SUPPORT_GPU
-    bool canFilterImageGPU() const override { return true; }
-    bool filterImageGPUDeprecated(Proxy* proxy, const SkBitmap& src, const Context& ctx,
-                                SkBitmap* result, SkIPoint* offset) const override;
-#endif
-
     SK_TO_STRING_OVERRIDE()
 
 protected:
+    sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
+                                        SkIPoint* offset) const override;
+
     SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,
                             ChannelSelectorType yChannelSelector,
                             SkScalar scale, 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