change flattenable factory to return sk_sp

gm/imagefiltersgraph.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 "gm.h"
 
 #include "SkArithmeticMode.h"
@@ skipping 66 matching lines @@
     SimpleOffsetFilter(SkScalar dx, SkScalar dy, SkImageFilter* input)
         : SkImageFilter(1, &input), fDX(dx), fDY(dy) {}
 
     SkScalar fDX, fDY;
 
     typedef SkImageFilter INHERITED;
 };
 
 static SimpleOffsetFilter::Registrar gReg;
 
-SkFlattenable* SimpleOffsetFilter::CreateProc(SkReadBuffer& buffer) {
+sk_sp<SkFlattenable> SimpleOffsetFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     SkScalar dx = buffer.readScalar();
     SkScalar dy = buffer.readScalar();
-    return Create(dx, dy, common.getInput(0).get());
+    return sk_sp<SkFlattenable>(Create(dx, dy, common.getInput(0).get()));
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SimpleOffsetFilter::toString(SkString* str) const {
     str->appendf("SimpleOffsetFilter: (");
     str->append(")");
 }
 #endif
 
 class ImageFiltersGraphGM : public skiagm::GM {
@@ skipping 136 matching lines @@
     }
 
     sk_sp<SkImage> fImage;
 
     typedef GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new ImageFiltersGraphGM;)