change flattenable factory to return sk_sp

src/effects/gradients/SkRadialGradient.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRadialGradient.h"
 #include "SkNx.h"
 
@@ skipping 42 matching lines @@
 
 SkShader::GradientType SkRadialGradient::asAGradient(GradientInfo* info) const {
     if (info) {
         commonAsAGradient(info);
         info->fPoint[0] = fCenter;
         info->fRadius[0] = fRadius;
     }
     return kRadial_GradientType;
 }
 
-SkFlattenable* SkRadialGradient::CreateProc(SkReadBuffer& buffer) {
+sk_sp<SkFlattenable> SkRadialGradient::CreateProc(SkReadBuffer& buffer) {
     DescriptorScope desc;
     if (!desc.unflatten(buffer)) {
         return nullptr;
     }
     const SkPoint center = buffer.readPoint();
     const SkScalar radius = buffer.readScalar();
     return SkGradientShader::MakeRadial(center, radius, desc.fColors, desc.fPos, desc.fCount,
-                                        desc.fTileMode, desc.fGradFlags,
-                                        desc.fLocalMatrix).release();
+                                        desc.fTileMode, desc.fGradFlags, desc.fLocalMatrix);
 }
 
 void SkRadialGradient::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePoint(fCenter);
     buffer.writeScalar(fRadius);
 }
 
 namespace {
 
@@ skipping 291 matching lines @@
     str->appendScalar(fCenter.fY);
     str->append(") radius: ");
     str->appendScalar(fRadius);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif