change flattenable factory to return sk_sp

src/effects/SkPaintImageFilter.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPaintImageFilter.h"
 #include "SkCanvas.h"
 #include "SkReadBuffer.h"
 #include "SkSpecialImage.h"
 #include "SkSpecialSurface.h"
 #include "SkWriteBuffer.h"
 
 SkPaintImageFilter::SkPaintImageFilter(const SkPaint& paint, const CropRect* cropRect)
     : INHERITED(nullptr, 0, cropRect)
     , fPaint(paint) {
 }
 
-SkFlattenable* SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) {
+sk_sp<SkFlattenable> SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
     SkPaint paint;
     buffer.readPaint(&paint);
-    return SkPaintImageFilter::Make(paint, &common.cropRect()).release();
+    return SkPaintImageFilter::Make(paint, &common.cropRect());
 }
 
 void SkPaintImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePaint(fPaint);
 }
 
 sk_sp<SkSpecialImage> SkPaintImageFilter::onFilterImage(SkSpecialImage* source,
                                                         const Context& ctx,
                                                         SkIPoint* offset) const {
@@ skipping 35 matching lines @@
     return true;
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkPaintImageFilter::toString(SkString* str) const {
     str->appendf("SkPaintImageFilter: (");
     fPaint.toString(str);
     str->append(")");
 }
 #endif