switch xfermodes over to sk_sp

include/core/SkPaint.h

 /*
  * Copyright 2006 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 SkPaint_DEFINED
 #define SkPaint_DEFINED
 
@@ skipping 521 matching lines @@
     /** Set or clear the xfermode object.
         <p />
         Pass NULL to clear any previous xfermode.
         As a convenience, the parameter passed is also returned.
         If a previous xfermode exists, its reference count is decremented.
         If xfermode is not NULL, its reference count is incremented.
         @param xfermode May be NULL. The new xfermode to be installed in the
                         paint
         @return         xfermode
     */
+    void setXfermode(sk_sp<SkXfermode>);
+#ifdef SK_SUPPORT_LEGACY_XFERMODE_PTR
     SkXfermode* setXfermode(SkXfermode* xfermode);
-    void setXfermode(sk_sp<SkXfermode>);
+#endif
 
     /** Create an xfermode based on the specified Mode, and assign it into the
         paint, returning the mode that was set. If the Mode is SrcOver, then
         the paint's xfermode is set to null.
      */
     SkXfermode* setXfermodeMode(SkXfermode::Mode);
 
     /** Get the paint's patheffect object.
         <p />
       The patheffect reference count is not affected.
@@ skipping 602 matching lines @@
     friend class GrStencilAndCoverTextContext;
     friend class GrPathRendering;
     friend class GrTextUtils;
     friend class GrGLPathRendering;
     friend class SkScalerContext;
     friend class SkTextBaseIter;
     friend class SkCanonicalizePaint;
 };
 
 #endif