SkXPS: compile under clang on win

src/xps/SkXPSDevice.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkXPSDevice_DEFINED
 #define SkXPSDevice_DEFINED
 
@@ skipping 131 matching lines @@
     public:
         SkFontID typefaceId;
         int ttcIndex;
         SkStream* fontData;
         IXpsOMFontResource* xpsFont;
         SkBitSet* glyphsUsed;
 
         explicit TypefaceUse();
         ~TypefaceUse();
     };
-    friend static HRESULT subset_typeface(TypefaceUse* current);
+    friend HRESULT subset_typeface(TypefaceUse* current);
 
     SkXPSDevice(IXpsOMObjectFactory* xpsFactory);
 
     SkAutoCoInitialize fAutoCo;
     SkTScopedComPtr<IXpsOMObjectFactory> fXpsFactory;
     SkTScopedComPtr<IStream> fOutputStream;
     SkTScopedComPtr<IXpsOMPackageWriter> fPackageWriter;
 
     unsigned int fCurrentPage;
     SkTScopedComPtr<IXpsOMCanvas> fCurrentXpsCanvas;
@@ skipping 152 matching lines @@
 
     // Disable the default copy and assign implementation.
     SkXPSDevice(const SkXPSDevice&);
     void operator=(const SkXPSDevice&);
 
     typedef SkBitmapDevice INHERITED;
 };
 
 #endif  // SK_BUILD_FOR_WIN
 #endif  // SkXPSDevice_DEFINED