Switch SkLocalMatrixImageFilter and SkPaintImageFilter over to sk_sp

tests/PaintImageFilterTest.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 "SkCanvas.h"
 #include "SkGradientShader.h"
 #include "SkPaintImageFilter.h"
@@ skipping 20 matching lines @@
     SkScalar radius = SkIntToScalar(5);
 
     SkPaint gradientPaint;
     gradientPaint.setShader(SkGradientShader::MakeRadial(
         center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
 
     // Test using the image filter
     {
         SkPaint paint;
         SkImageFilter::CropRect cr(r);
-        paint.setImageFilter(SkPaintImageFilter::Create(gradientPaint, &cr))->unref();
+        paint.setImageFilter(SkPaintImageFilter::Make(gradientPaint, &cr));
         canvasFilter.drawRect(r, paint);
     }
 
     // Test using the paint directly
     {
         canvasPaint.drawRect(r, gradientPaint);
     }
 
     // Assert that both paths yielded the same result
     for (int y = 0; y < r.height(); ++y) {
@@ skipping 25 matching lines @@
     SkScalar radius = SkIntToScalar(5);
 
     SkPaint gradientPaint;
     gradientPaint.setShader(SkGradientShader::MakeRadial(
         center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
 
     // Test using the image filter
     {
         SkPaint paint;
         SkImageFilter::CropRect cr(r);
-        paint.setImageFilter(SkPaintImageFilter::Create(gradientPaint, &cr))->unref();
+        paint.setImageFilter(SkPaintImageFilter::Make(gradientPaint, &cr));
         canvasFilter.scale(SkIntToScalar(2), SkIntToScalar(2));
         canvasFilter.drawRect(r, paint);
     }
 
     // Test using the paint directly
     {
         canvasPaint.scale(SkIntToScalar(2), SkIntToScalar(2));
         canvasPaint.drawRect(r, gradientPaint);
     }
 
     // Assert that both paths yielded the same result
     for (int y = 0; y < r.height(); ++y) {
         const SkPMColor* filterPtr = filterResult.getAddr32(0, y);
         const SkPMColor* paintPtr = paintResult.getAddr32(0, y);
         for (int x = 0; x < r.width(); ++x, ++filterPtr, ++paintPtr) {
             REPORTER_ASSERT(reporter, *filterPtr == *paintPtr);
         }
     }
 }
 
 DEF_TEST(PaintImageFilter, reporter) {
     test_unscaled(reporter);
     test_scaled(reporter);
 }