Switch new SkImageFilter internal methods over to sk_sp

src/core/SkLocalMatrixImageFilter.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLocalMatrixImageFilter.h"
 #include "SkReadBuffer.h"
+#include "SkSpecialImage.h"
 #include "SkString.h"
 
 SkImageFilter* SkLocalMatrixImageFilter::Create(const SkMatrix& localM, SkImageFilter* input) {
     if (!input) {
         return nullptr;
     }
     if (localM.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
         return nullptr;
     }
     if (localM.isIdentity()) {
@@ skipping 12 matching lines @@
     SkMatrix lm;
     buffer.readMatrix(&lm);
     return SkLocalMatrixImageFilter::Create(lm, common.getInput(0));
 }
 
 void SkLocalMatrixImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeMatrix(fLocalM);
 }
 
-SkSpecialImage* SkLocalMatrixImageFilter::onFilterImage(SkSpecialImage* source, const Context& ctx,
-                                                        SkIPoint* offset) const {
+sk_sp<SkSpecialImage> SkLocalMatrixImageFilter::onFilterImage(SkSpecialImage* source,
+                                                              const Context& ctx,
+                                                              SkIPoint* offset) const {
     Context localCtx(SkMatrix::Concat(ctx.ctm(), fLocalM), ctx.clipBounds(), ctx.cache());
     return this->filterInput(0, source, localCtx, offset);
 }
 
 SkIRect SkLocalMatrixImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& matrix,
                                                  MapDirection direction) const {
     return this->getInput(0)->filterBounds(src, SkMatrix::Concat(matrix, fLocalM), direction);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkLocalMatrixImageFilter::toString(SkString* str) const {
     str->append("SkLocalMatrixImageFilter: (");
     str->append(")");
 }
 #endif