change flattenable factory to return sk_sp

src/effects/SkCornerPathEffect.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkCornerPathEffect.h"
 #include "SkPath.h"
@@ skipping 120 matching lines @@
 
         if (SkPath::kMove_Verb == prevVerb) {
             firstStep = step;
         }
         prevVerb = verb;
     }
 DONE:
     return true;
 }
 
-SkFlattenable* SkCornerPathEffect::CreateProc(SkReadBuffer& buffer) {
-    return SkCornerPathEffect::Make(buffer.readScalar()).release();
+sk_sp<SkFlattenable> SkCornerPathEffect::CreateProc(SkReadBuffer& buffer) {
+    return SkCornerPathEffect::Make(buffer.readScalar());
 }
 
 void SkCornerPathEffect::flatten(SkWriteBuffer& buffer) const {
     buffer.writeScalar(fRadius);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkCornerPathEffect::toString(SkString* str) const {
     str->appendf("SkCornerPathEffect: (");
     str->appendf("radius: %.2f", fRadius);
     str->appendf(")");
 }
 #endif