Port SkRefCnt.h to new SkAtomics.h

src/utils/win/SkDWriteFontFileStream.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDWriteFontFileStream_DEFINED
 #define SkDWriteFontFileStream_DEFINED
 
 #include "SkTypes.h"
 
+#include "SkMutex.h"
 #include "SkStream.h"
 #include "SkTScopedComPtr.h"
 
 #include <dwrite.h>
 
 /**
  *  An SkStream backed by an IDWriteFontFileStream.
  *  This allows Skia code to read an IDWriteFontFileStream.
  */
 class SkDWriteFontFileStream : public SkStreamMemory {
@@ skipping 45 matching lines @@
 
 private:
     explicit SkDWriteFontFileStreamWrapper(SkStream* stream);
     virtual ~SkDWriteFontFileStreamWrapper() { }
 
     ULONG fRefCount;
     SkAutoTDelete<SkStream> fStream;
     SkMutex fStreamMutex;
 };
 #endif