Update SkMergeImageFilter to sk_sp

src/effects/SkOffsetImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOffsetImageFilter.h"
 
 #include "SkCanvas.h"
@@ skipping 68 matching lines @@
         vec.negate();
     }
 
     return src.makeOffset(SkScalarCeilToInt(vec.fX), SkScalarCeilToInt(vec.fY));
 }
 
 SkFlattenable* SkOffsetImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     SkPoint offset;
     buffer.readPoint(&offset);
-    return Create(offset.x(), offset.y(), common.getInput(0), &common.cropRect());
+    return Create(offset.x(), offset.y(), common.getInput(0).get(), &common.cropRect());
 }
 
 void SkOffsetImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePoint(fOffset);
 }
 
 SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input,
                                          const CropRect* cropRect)
   : INHERITED(1, &input, cropRect) {
     fOffset.set(dx, dy);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkOffsetImageFilter::toString(SkString* str) const {
     str->appendf("SkOffsetImageFilter: (");
     str->appendf("offset: (%f, %f) ", fOffset.fX, fOffset.fY);
     str->append("input: (");
     if (this->getInput(0)) {
         this->getInput(0)->toString(str);
     }
     str->append("))");
 }
 #endif