change flattenable factory to return sk_sp

src/effects/gradients/SkTwoPointConicalGradient.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 "SkTwoPointConicalGradient.h"
 #include "SkTwoPointConicalGradient_gpu.h"
 
@@ skipping 287 matching lines @@
         info->fRadius[0] = fRadius1;
         info->fRadius[1] = fRadius2;
         if (fFlippedGrad) {
             SkTSwap(info->fPoint[0], info->fPoint[1]);
             SkTSwap(info->fRadius[0], info->fRadius[1]);
         }
     }
     return kConical_GradientType;
 }
 
-SkFlattenable* SkTwoPointConicalGradient::CreateProc(SkReadBuffer& buffer) {
+sk_sp<SkFlattenable> SkTwoPointConicalGradient::CreateProc(SkReadBuffer& buffer) {
     DescriptorScope desc;
     if (!desc.unflatten(buffer)) {
         return nullptr;
     }
     SkPoint c1 = buffer.readPoint();
     SkPoint c2 = buffer.readPoint();
     SkScalar r1 = buffer.readScalar();
     SkScalar r2 = buffer.readScalar();
 
     if (buffer.readBool()) {    // flipped
@@ skipping 14 matching lines @@
         }
         if (pos) {
             if (desc.fCount & 1) {
                 pos[half] = SK_Scalar1 - pos[half];
             }
         }
     }
 
     return SkGradientShader::MakeTwoPointConical(c1, r1, c2, r2, desc.fColors, desc.fPos,
                                                  desc.fCount, desc.fTileMode, desc.fGradFlags,
-                                                 desc.fLocalMatrix).release();
+                                                 desc.fLocalMatrix);
 }
 
 void SkTwoPointConicalGradient::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePoint(fCenter1);
     buffer.writePoint(fCenter2);
     buffer.writeScalar(fRadius1);
     buffer.writeScalar(fRadius2);
     buffer.writeBool(fFlippedGrad);
 }
@@ skipping 34 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif