Move SkImageFilter over to storing sk_sps

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 70 matching lines @@
     }
 
     skiatest::Reporter* fReporter;
     SkMatrix fExpectedMatrix;
 
     typedef SkImageFilter INHERITED;
 };
 
 class FailImageFilter : public SkImageFilter {
 public:
-    FailImageFilter() : SkImageFilter(0, nullptr) {
-    }
+    FailImageFilter() : SkImageFilter(nullptr, 0, nullptr) { }
 
     sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source,
                                         const Context& ctx,
                                         SkIPoint* offset) const override {
         return nullptr;
     }
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(FailImageFilter)
 
@@ skipping 1664 matching lines @@
 
     test_xfermode_cropped_input(&canvas, reporter);
 }
 
 DEF_GPUTEST_FOR_ALL_GL_CONTEXTS(ImageFilterBlurLargeImage_Gpu, reporter, ctxInfo) {
     auto surface(SkSurface::MakeRenderTarget(ctxInfo.fGrContext, SkBudgeted::kYes,
                                              SkImageInfo::MakeN32Premul(100, 100)));
     test_large_blur_input(reporter, surface->getCanvas());
 }
 #endif