change flattenable factory to return sk_sp

experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDither.h"
 #include "SkPerlinNoiseShader2.h"
 #include "SkColorFilter.h"
@@ skipping 334 matching lines @@
   , fSeed(seed)
   , fTileSize(nullptr == tileSize ? SkISize::Make(0, 0) : *tileSize)
   , fStitchTiles(!fTileSize.isEmpty())
 {
     SkASSERT(numOctaves >= 0 && numOctaves < 256);
 }
 
 SkPerlinNoiseShader2::~SkPerlinNoiseShader2() {
 }
 
-SkFlattenable* SkPerlinNoiseShader2::CreateProc(SkReadBuffer& buffer) {
+sk_sp<SkFlattenable> SkPerlinNoiseShader2::CreateProc(SkReadBuffer& buffer) {
     Type type = (Type)buffer.readInt();
     SkScalar freqX = buffer.readScalar();
     SkScalar freqY = buffer.readScalar();
     int octaves = buffer.readInt();
     SkScalar seed = buffer.readScalar();
     SkISize tileSize;
     tileSize.fWidth = buffer.readInt();
     tileSize.fHeight = buffer.readInt();
 
     switch (type) {
         case kFractalNoise_Type:
-            return SkPerlinNoiseShader2::MakeFractalNoise(freqX, freqY, octaves, seed,
-                                                          &tileSize).release();
+            return SkPerlinNoiseShader2::MakeFractalNoise(freqX, freqY, octaves, seed, &tileSize);
         case kTurbulence_Type:
-            return SkPerlinNoiseShader2::MakeTubulence(freqX, freqY, octaves, seed,
-                                                       &tileSize).release();
+            return SkPerlinNoiseShader2::MakeTubulence(freqX, freqY, octaves, seed, &tileSize);
         case kImprovedNoise_Type:
-            return SkPerlinNoiseShader2::MakeImprovedNoise(freqX, freqY, octaves, seed).release();
+            return SkPerlinNoiseShader2::MakeImprovedNoise(freqX, freqY, octaves, seed);
         default:
             return nullptr;
     }
 }
 
 void SkPerlinNoiseShader2::flatten(SkWriteBuffer& buffer) const {
     buffer.writeInt((int) fType);
     buffer.writeScalar(fBaseFrequencyX);
     buffer.writeScalar(fBaseFrequencyY);
     buffer.writeInt(fNumOctaves);
@@ skipping 1014 matching lines @@
     str->append(" seed: ");
     str->appendScalar(fSeed);
     str->append(" stitch tiles: ");
     str->append(fStitchTiles ? "true " : "false ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif