Stop using SkAutoTUnref on SkStream.

Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp

Index: Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp
diff --git a/Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp b/Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp
index 3be7d1910b6c2101381eacddb0f805006d9a2f7a..cf6530a590d1a7e86983e58a63bc589e94c9f092 100644
--- a/Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp
+++ b/Source/platform/fonts/mac/FontCustomPlatformDataMac.cpp
@@ -63,8 +63,7 @@ PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer*
     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;