change flattenable factory to return sk_sp

gm/dcshader.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #if SK_SUPPORT_GPU
 #include "GrFragmentProcessor.h"
@@ skipping 32 matching lines @@
 #ifndef SK_IGNORE_TO_STRING
     void toString(SkString* str) const override {
         str->appendf("DCShader: ()");
     }
 #endif
 
 private:
     const SkMatrix fDeviceMatrix;
 };
 
-SkFlattenable* DCShader::CreateProc(SkReadBuffer& buf) {
+sk_sp<SkFlattenable> DCShader::CreateProc(SkReadBuffer& buf) {
     SkMatrix matrix;
     buf.readMatrix(&matrix);
-    return new DCShader(matrix);
+    return sk_make_sp<DCShader>(matrix);
 }
 
 class DCFP : public GrFragmentProcessor {
 public:
     DCFP(const SkMatrix& m) : fDeviceTransform(kDevice_GrCoordSet, m) {
         this->addCoordTransform(&fDeviceTransform);
         this->initClassID<DCFP>();
     }
 
     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
@@ skipping 223 matching lines @@
     };
 
     SkTArray<Prim*> fPrims;
 
     typedef GM INHERITED;
 };
 
 DEF_GM(return new DCShaderGM;)
 }
 #endif