switch surface to sk_sp

src/pdf/SkPDFDevice.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 SkPDFDevice_DEFINED
 #define SkPDFDevice_DEFINED
 
@@ skipping 177 matching lines @@
         return *(fFontGlyphUsage.get());
     }
 
     SkPDFCanon* getCanon() const;
 
 protected:
     const SkBitmap& onAccessBitmap() override {
         return fLegacyBitmap;
     }
 
-    SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) override;
+    sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&) override;
 
     void drawAnnotation(const SkDraw&, const SkRect&, const char key[], SkData* value) override;
 
 private:
     struct RectWithData {
         SkRect rect;
         sk_sp<SkData> data;
         RectWithData(const SkRect& rect, SkData* data)
             : rect(rect), data(SkRef(data)) {}
         RectWithData(RectWithData&& other)
@@ skipping 128 matching lines @@
 
     typedef SkBaseDevice INHERITED;
 
     // TODO(edisonn): Only SkDocument_PDF and SkPDFImageShader should be able to create
     // an SkPDFDevice
     //friend class SkDocument_PDF;
     //friend class SkPDFImageShader;
 };
 
 #endif