switch surface to sk_sp

include/core/SkDevice.h

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDevice_DEFINED
 #define SkDevice_DEFINED
 
@@ skipping 278 matching lines @@
      *  If the device does not recognize or support this filter,
      *  it just returns false and leaves result and offset unchanged.
      */
     virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
                              const SkImageFilter::Context&,
                              SkBitmap* /*result*/, SkIPoint* /*offset*/) {
         return false;
     }
 
 protected:
-    virtual SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) { return NULL; }
+    virtual sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&);
     virtual bool onPeekPixels(SkPixmap*) { return false; }
 
     /**
      *  The caller is responsible for "pre-clipping" the dst. The impl can assume that the dst
      *  image at the specified x,y offset will fit within the device's bounds.
      *
      *  This is explicitly asserted in readPixels(), the public way to call this.
      */
     virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int x, int y);
 
@@ skipping 106 matching lines @@
     SkSurfaceProps fSurfaceProps;
 
 #ifdef SK_DEBUG
     bool        fAttachedToCanvas;
 #endif
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif