Change SkStream.

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 "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 SkStream {
+class SkDWriteFontFileStream : public SkStreamMemory {
 public:
     explicit SkDWriteFontFileStream(IDWriteFontFileStream* fontFileStream);
     virtual ~SkDWriteFontFileStream();
 
+    virtual size_t read(void* buffer, size_t size) SK_OVERRIDE;
+    virtual bool atEnd() const SK_OVERRIDE;
     virtual bool rewind() SK_OVERRIDE;
-    virtual size_t read(void* buffer, size_t size) SK_OVERRIDE;
+    virtual SkDWriteFontFileStream* duplicate() const SK_OVERRIDE;
+    virtual size_t getPosition() const SK_OVERRIDE;
+    virtual bool seek(size_t position) SK_OVERRIDE;
+    virtual bool move(long offset) SK_OVERRIDE;
+    virtual SkDWriteFontFileStream* fork() const SK_OVERRIDE;
+    virtual size_t getLength() const SK_OVERRIDE;
     virtual const void* getMemoryBase() SK_OVERRIDE;
 
 private:
     SkTScopedComPtr<IDWriteFontFileStream> fFontFileStream;
     size_t fPos;
     const void* fLockedMemory;
     void* fFragmentLock;
 };
 
 /**
@@ skipping 21 matching lines @@
     static HRESULT Create(SkStream* stream, SkDWriteFontFileStreamWrapper** streamFontFileStream);
 
 private:
     explicit SkDWriteFontFileStreamWrapper(SkStream* stream);
 
     ULONG fRefCount;
     SkAutoTUnref<SkStream> fStream;
     SkMutex fStreamMutex;
 };
 #endif