Switch SkSpecialImage & SkSpecialSurface classes over to smart pointers

src/effects/SkMergeImageFilter.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 "SkMergeImageFilter.h"
 
 #include "SkCanvas.h"
@@ skipping 80 matching lines @@
     if (!bounds.intersect(ctx.clipBounds())) {
         return nullptr;
     }
 
     const int x0 = bounds.left();
     const int y0 = bounds.top();
 
     SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(),
                                             kPremul_SkAlphaType);
 
-    SkAutoTUnref<SkSpecialSurface> surf(source->newSurface(info));
+    sk_sp<SkSpecialSurface> surf(source->makeSurface(info));
     if (!surf) {
         return nullptr;
     }
 
     SkCanvas* canvas = surf->getCanvas();
     SkASSERT(canvas);
 
     canvas->clear(0x0);
 
     // Composite all of the filter inputs.
     for (int i = 0; i < inputCount; ++i) {
         if (!inputs[i]) {
             continue;
         }
 
         SkPaint paint;
         if (fModes) {
             paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
         }
 
         inputs[i]->draw(canvas,
                         SkIntToScalar(offsets[i].x() - x0), SkIntToScalar(offsets[i].y() - y0),
                         &paint);
     }
 
     offset->fX = bounds.left();
     offset->fY = bounds.top();
-    return surf->newImageSnapshot();
+    return surf->makeImageSnapshot().release();
 }
 
 SkFlattenable* SkMergeImageFilter::CreateProc(SkReadBuffer& buffer) {
     Common common;
     if (!common.unflatten(buffer, -1)) {
         return nullptr;
     }
 
     const int count = common.inputCount();
     bool hasModes = buffer.readBool();
@@ skipping 30 matching lines @@
     for (int i = 0; i < this->countInputs(); ++i) {
         SkImageFilter* filter = this->getInput(i);
         str->appendf("%d: (", i);
         filter->toString(str);
         str->appendf(")");
     }
 
     str->append(")");
 }
 #endif