Stop using SkAutoTUnref on SkStream.

Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp

 /*
  * Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 45 matching lines @@
     if (!transcodeBuffer)
         return nullptr; // validation failed.
     buffer = transcodeBuffer.get();
 
     RetainPtr<CFDataRef> bufferData(AdoptCF, CFDataCreate(0, reinterpret_cast<const UInt8*>(buffer->data()), buffer->size()));
     RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(bufferData.get()));
     RetainPtr<CGFontRef> cgFontRef(AdoptCF, CGFontCreateWithDataProvider(dataProvider.get()));
     if (!cgFontRef)
         return nullptr;
 
-    SkAutoTUnref<SkMemoryStream> stream(new SkMemoryStream(buffer->getAsSkData().get()));
-    RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(stream.get()));
+    RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(new SkMemoryStream(buffer->getAsSkData().get())));
     if (!typeface)
         return nullptr;
 
     return adoptPtr(new FontCustomPlatformData(cgFontRef.leakRef(), typeface.release()));
 }
 
 bool FontCustomPlatformData::supportsFormat(const String& format)
 {
     return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
 }
 
 } // namespace blink