Update SkImageSource to sk_sp

src/effects/SkImageSource.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 "SkImageSource.h"
 
 #include "SkCanvas.h"
 #include "SkImage.h"
 #include "SkReadBuffer.h"
 #include "SkSpecialImage.h"
 #include "SkSpecialSurface.h"
 #include "SkWriteBuffer.h"
 #include "SkString.h"
 
-SkImageFilter* SkImageSource::Create(SkImage* image) {
-    return image ? new SkImageSource(image) : nullptr;
+
+SkImageSource::SkImageSource(sk_sp<SkImage> image)
+    : INHERITED(0, nullptr)
+    , fImage(std::move(image))
+    , fSrcRect(SkRect::MakeIWH(fImage->width(), fImage->height()))
+    , fDstRect(fSrcRect)
+    , fFilterQuality(kHigh_SkFilterQuality) {
 }
 
-SkImageFilter* SkImageSource::Create(SkImage* image,
-                                     const SkRect& srcRect,
-                                     const SkRect& dstRect,
-                                     SkFilterQuality filterQuality) {
-    return image ? new SkImageSource(image, srcRect, dstRect, filterQuality) : nullptr;
-}
-
-SkImageSource::SkImageSource(SkImage* image)
-    : INHERITED(0, nullptr)
-    , fImage(SkRef(image))
-    , fSrcRect(SkRect::MakeIWH(image->width(), image->height()))
-    , fDstRect(fSrcRect)
-    , fFilterQuality(kHigh_SkFilterQuality) { }
-
-SkImageSource::SkImageSource(SkImage* image,
+SkImageSource::SkImageSource(sk_sp<SkImage> image,
                              const SkRect& srcRect,
                              const SkRect& dstRect,
                              SkFilterQuality filterQuality)
     : INHERITED(0, nullptr)
-    , fImage(SkRef(image))
+    , fImage(std::move(image))
     , fSrcRect(srcRect)
     , fDstRect(dstRect)
-    , fFilterQuality(filterQuality) { }
+    , fFilterQuality(filterQuality) {
+}
 
 SkFlattenable* SkImageSource::CreateProc(SkReadBuffer& buffer) {
     SkFilterQuality filterQuality = (SkFilterQuality)buffer.readInt();
 
     SkRect src, dst;
     buffer.readRect(&src);
     buffer.readRect(&dst);
 
-    SkAutoTUnref<SkImage> image(buffer.readImage());
+    sk_sp<SkImage> image(buffer.readImage());
     if (!image) {
         return nullptr;
     }
 
-    return SkImageSource::Create(image, src, dst, filterQuality);
+    return SkImageSource::Make(std::move(image), src, dst, filterQuality).release();
 }
 
 void SkImageSource::flatten(SkWriteBuffer& buffer) const {
     buffer.writeInt(fFilterQuality);
     buffer.writeRect(fSrcRect);
     buffer.writeRect(fDstRect);
     buffer.writeImage(fImage.get());
 }
 
 sk_sp<SkSpecialImage> SkImageSource::onFilterImage(SkSpecialImage* source, const Context& ctx,
@@ skipping 52 matching lines @@
 void SkImageSource::toString(SkString* str) const {
     str->appendf("SkImageSource: (");
     str->appendf("src: (%f,%f,%f,%f) dst: (%f,%f,%f,%f) ",
                  fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom,
                  fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
     str->appendf("image: (%d,%d)",
                  fImage->width(), fImage->height());
     str->append(")");
 }
 #endif