RefPtr -> SkAutoTUnref on SkStream to remove SkRefCnt.

Source/platform/fonts/skia/FontCustomPlatformDataSkia.cpp

 /*
  * Copyright (C) 2007 Apple Computer, Inc.
  * Copyright (c) 2007, 2008, 2009, Google Inc. All rights reserved.
  * Copyright (C) 2010 Company 100, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 79 matching lines @@
 PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer* buffer)
 {
     ASSERT_ARG(buffer, buffer);
 
     OpenTypeSanitizer sanitizer(buffer);
     RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
     if (!transcodeBuffer)
         return nullptr; // validation failed.
     buffer = transcodeBuffer.get();
 
-    RefPtr<SkMemoryStream> stream = adoptRef(new SkMemoryStream(buffer->getAsSkData().get()));
+    SkAutoTUnref<SkMemoryStream> stream(new SkMemoryStream(buffer->getAsSkData().get()));
 #if OS(WIN)
     RefPtr<SkTypeface> typeface = adoptRef(FontCache::fontCache()->fontManager()->createFromStream(stream.get()));
 #else
     RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(stream.get()));
 #endif
     if (!typeface)
         return nullptr;
 
     return adoptPtr(new FontCustomPlatformData(typeface.release()));
 }
 
 bool FontCustomPlatformData::supportsFormat(const String& format)
 {
     return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
 }
 
 } // namespace blink