Switch new SkImageFilter internal methods over to sk_sp

src/effects/SkComposeImageFilter.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 "SkComposeImageFilter.h"
 
 #include "SkReadBuffer.h"
 #include "SkSpecialImage.h"
 #include "SkWriteBuffer.h"
 
 
 SkRect SkComposeImageFilter::computeFastBounds(const SkRect& src) const {
     SkImageFilter* outer = getInput(0);
     SkImageFilter* inner = getInput(1);
 
     return outer->computeFastBounds(inner->computeFastBounds(src));
 }
 
-SkSpecialImage* SkComposeImageFilter::onFilterImage(SkSpecialImage* source, const Context& ctx,
-                                                    SkIPoint* offset) const {
+sk_sp<SkSpecialImage> SkComposeImageFilter::onFilterImage(SkSpecialImage* source,
+                                                          const Context& ctx,
+                                                          SkIPoint* offset) const {
     // The bounds passed to the inner filter must be filtered by the outer
     // filter, so that the inner filter produces the pixels that the outer
     // filter requires as input. This matters if the outer filter moves pixels.
     SkIRect innerClipBounds;
     innerClipBounds = getInput(0)->filterBounds(ctx.clipBounds(), ctx.ctm());
     Context innerContext(ctx.ctm(), innerClipBounds, ctx.cache());
     SkIPoint innerOffset = SkIPoint::Make(0, 0);
-    SkAutoTUnref<SkSpecialImage> inner(this->filterInput(1, source, innerContext, &innerOffset));
+    sk_sp<SkSpecialImage> inner(this->filterInput(1, source, innerContext, &innerOffset));
     if (!inner) {
         return nullptr;
     }
 
     SkMatrix outerMatrix(ctx.ctm());
     outerMatrix.postTranslate(SkIntToScalar(-innerOffset.x()), SkIntToScalar(-innerOffset.y()));
     SkIRect clipBounds = ctx.clipBounds();
     clipBounds.offset(-innerOffset.x(), -innerOffset.y());
     Context outerContext(outerMatrix, clipBounds, ctx.cache());
 
     SkIPoint outerOffset = SkIPoint::Make(0, 0);
-    SkAutoTUnref<SkSpecialImage> outer(this->filterInput(0, inner, outerContext, &outerOffset));
+    sk_sp<SkSpecialImage> outer(this->filterInput(0, inner.get(), outerContext, &outerOffset));
     if (!outer) {
         return nullptr;
     }
 
     *offset = innerOffset + outerOffset;
-    return outer.release();
+    return outer;
 }
 
 SkIRect SkComposeImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                              MapDirection direction) const {
     SkImageFilter* outer = this->getInput(0);
     SkImageFilter* inner = this->getInput(1);
 
     return outer->filterBounds(inner->filterBounds(src, ctm, direction), ctm, direction);
 }
 
@@ skipping 11 matching lines @@
 
     str->appendf("outer: ");
     outer->toString(str);
 
     str->appendf("inner: ");
     inner->toString(str);
 
     str->appendf(")");
 }
 #endif