SkDocument/PDF: new API

src/xps/SkDocument_XPS_None.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTypes.h"
 #if !defined(SK_BUILD_FOR_WIN32)
 
 #include "SkDocument.h"
-SkDocument* SkDocument::CreateXPS(SkWStream*, SkScalar) { return nullptr; }
-SkDocument* SkDocument::CreateXPS(const char path[], SkScalar) { return nullptr; }
+sk_sp<SkDocument> SkDocument::MakeXPS(SkWStream*, SkScalar) { return nullptr; }
+sk_sp<SkDocument> SkDocument::MakeXPS(const char path[], SkScalar) {
+    return nullptr;
+}
 
 #endif//!defined(SK_BUILD_FOR_WIN32)