change flattenable factory to return sk_sp

tests/ImageFilterTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkBitmapDevice.h"
 #include "SkBlurImageFilter.h"
@@ skipping 201 matching lines @@
     };
     void addFilter(const char* name, SkImageFilter* filter) {
         fFilters.push_back(Filter(name, filter));
     }
 
     SkTArray<Filter> fFilters;
 };
 
 }
 
-SkFlattenable* MatrixTestImageFilter::CreateProc(SkReadBuffer& buffer) {
+sk_sp<SkFlattenable> MatrixTestImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     skiatest::Reporter* reporter = (skiatest::Reporter*)buffer.readFunctionPtr();
     SkMatrix matrix;
     buffer.readMatrix(&matrix);
-    return new MatrixTestImageFilter(reporter, matrix);
+    return sk_make_sp<MatrixTestImageFilter>(reporter, matrix);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void MatrixTestImageFilter::toString(SkString* str) const {
     str->appendf("MatrixTestImageFilter: (");
     str->append(")");
 }
 #endif
 
 static sk_sp<SkImage> make_small_image() {
@@ skipping 1354 matching lines @@
 
     test_xfermode_cropped_input(&canvas, reporter);
 }
 
 DEF_GPUTEST_FOR_ALL_CONTEXTS(BlurLargeImage_Gpu, reporter, context) {
     auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kYes,
                                              SkImageInfo::MakeN32Premul(100, 100)));
     test_large_blur_input(reporter, surface->getCanvas());
 }
 #endif