Switch new SkImageFilter internal methods over to sk_sp

src/effects/SkDropShadowImageFilter.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 "SkDropShadowImageFilter.h"
 
 #include "SkBlurImageFilter.h"
@@ skipping 33 matching lines @@
 void SkDropShadowImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeScalar(fDx);
     buffer.writeScalar(fDy);
     buffer.writeScalar(fSigmaX);
     buffer.writeScalar(fSigmaY);
     buffer.writeColor(fColor);
     buffer.writeInt(static_cast<int>(fShadowMode));
 }
 
-SkSpecialImage* SkDropShadowImageFilter::onFilterImage(SkSpecialImage* source, const Context& ctx,
-                                                       SkIPoint* offset) const {
+sk_sp<SkSpecialImage> SkDropShadowImageFilter::onFilterImage(SkSpecialImage* source,
+                                                             const Context& ctx,
+                                                             SkIPoint* offset) const {
     SkIPoint inputOffset = SkIPoint::Make(0, 0);
-    SkAutoTUnref<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
+    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
     if (!input) {
         return nullptr;
     }
 
     const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(),
                                                   input->width(), input->height());
     SkIRect bounds;
     if (!this->applyCropRect(ctx, inputBounds, &bounds)) {
         return nullptr;
     }
@@ skipping 26 matching lines @@
 
     canvas->translate(SkIntToScalar(inputOffset.fX - bounds.fLeft),
                       SkIntToScalar(inputOffset.fY - bounds.fTop));
     input->draw(canvas, offsetVec.fX, offsetVec.fY, &paint);
 
     if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
         input->draw(canvas, 0, 0, nullptr);
     }
     offset->fX = bounds.fLeft;
     offset->fY = bounds.fTop;
-    return surf->makeImageSnapshot().release();
+    return surf->makeImageSnapshot();
 }
 
 SkRect SkDropShadowImageFilter::computeFastBounds(const SkRect& src) const {
     SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src;
     SkRect shadowBounds = bounds;
     shadowBounds.offset(fDx, fDy);
     shadowBounds.outset(SkScalarMul(fSigmaX, SkIntToScalar(3)),
                         SkScalarMul(fSigmaY, SkIntToScalar(3)));
     if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
         bounds.join(shadowBounds);
@@ skipping 38 matching lines @@
         "kDrawShadowAndForeground", "kDrawShadowOnly"
     };
 
     static_assert(kShadowModeCount == SK_ARRAY_COUNT(gModeStrings), "enum_mismatch");
 
     str->appendf(" mode: %s", gModeStrings[fShadowMode]);
 
     str->append(")");
 }
 #endif