Update DirectWrite streams to SkStreamAsset.

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
 
@@ skipping 47 matching lines @@
     virtual HRESULT STDMETHODCALLTYPE ReadFileFragment(
         void const** fragmentStart,
         UINT64 fileOffset,
         UINT64 fragmentSize,
         void** fragmentContext);
 
     virtual void STDMETHODCALLTYPE ReleaseFileFragment(void* fragmentContext);
     virtual HRESULT STDMETHODCALLTYPE GetFileSize(UINT64* fileSize);
     virtual HRESULT STDMETHODCALLTYPE GetLastWriteTime(UINT64* lastWriteTime);
 
-    static HRESULT Create(SkStream* stream, SkDWriteFontFileStreamWrapper** streamFontFileStream);
+    static HRESULT Create(SkStreamAsset* stream,
+                          SkDWriteFontFileStreamWrapper** streamFontFileStream);
 
 private:
-    explicit SkDWriteFontFileStreamWrapper(SkStream* stream);
+    explicit SkDWriteFontFileStreamWrapper(SkStreamAsset* stream);
     virtual ~SkDWriteFontFileStreamWrapper() { }
 
     ULONG fRefCount;
-    SkAutoTDelete<SkStream> fStream;
+    SkAutoTDelete<SkStreamAsset> fStream;
     SkMutex fStreamMutex;
 };
 #endif