SkFontData to use smart pointers.

include/ports/SkFontMgr.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFontMgr_DEFINED
 #define SkFontMgr_DEFINED
 
@@ skipping 132 matching lines @@
     private:
         int fCollectionIndex;
         int fAxisCount;
         const Axis* fAxes;
     };
     /* Experimental, API subject to change. */
     SkTypeface* createFromStream(SkStreamAsset*, const FontParameters&) const;
 
     /**
      *  Create a typeface from the specified font data.
-     *  Takes ownership of the font data, so the caller should not reference it again.
      *  Will return NULL if the typeface could not be created.
      *  The caller must call unref() on the returned object if it is not null.
      */
-    SkTypeface* createFromFontData(SkFontData*) const;
+    SkTypeface* createFromFontData(std::unique_ptr<SkFontData>) const;
 
     /**
      *  Create a typeface for the specified fileName and TTC index
      *  (pass 0 for none) or NULL if the file is not found, or its contents are
      *  not recognized. The caller must call unref() on the returned object
      *  if it is not null.
      */
     SkTypeface* createFromFile(const char path[], int ttcIndex = 0) const;
 
     SkTypeface* legacyCreateTypeface(const char familyName[], SkFontStyle style) const;
@@ skipping 17 matching lines @@
     virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
                                                     const char* bcp47[], int bcp47Count,
                                                     SkUnichar character) const = 0;
     virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
                                          const SkFontStyle&) const = 0;
 
     virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) const = 0;
     virtual SkTypeface* onCreateFromStream(SkStreamAsset*, int ttcIndex) const = 0;
     // TODO: make pure virtual.
     virtual SkTypeface* onCreateFromStream(SkStreamAsset*, const FontParameters&) const;
-    virtual SkTypeface* onCreateFromFontData(SkFontData*) const;
+    virtual SkTypeface* onCreateFromFontData(std::unique_ptr<SkFontData>) const;
+#ifdef SK_DECLARE_LEGACY_CREATE_FROM_FONTDATA
+    virtual SkTypeface* onCreateFromFontData(SkFontData*) const { return nullptr; };
+#endif
     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const = 0;
 
     virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], SkFontStyle) const = 0;
 
 private:
     static SkFontMgr* Factory();    // implemented by porting layer
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif