change readTypeface to return sk_sp

src/core/SkReadBuffer.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 SkReadBuffer_DEFINED
 #define SkReadBuffer_DEFINED
 
@@ skipping 148 matching lines @@
             return SkData::MakeEmpty();
         }
         void* buffer = sk_malloc_throw(len);
         this->readByteArray(buffer, len);
         return SkData::MakeFromMalloc(buffer, len);
     }
 
     // helpers to get info about arrays and binary data
     virtual uint32_t getArrayCount();
 
-    /**
-     *  Returns false if the image could not be completely read. In that case, it will be set
-     *  to have width/height, but no pixels.
-     */
     sk_sp<SkImage> readBitmapAsImage();
     sk_sp<SkImage> readImage();
-
-    virtual SkTypeface* readTypeface();
+    virtual sk_sp<SkTypeface> readTypeface();
 
     void setTypefaceArray(SkTypeface* array[], int count) {
         fTFArray = array;
         fTFCount = count;
     }
 
     /**
      *  Call this with a pre-loaded array of Factories, in the same order as
      *  were created/written by the writer. SkPicture uses this.
      */
@@ skipping 70 matching lines @@
     SkImageDeserializer* fImageDeserializer;
 
 #ifdef DEBUG_NON_DETERMINISTIC_ASSERT
     // Debugging counter to keep track of how many bitmaps we
     // have decoded.
     int fDecodedBitmapIndex;
 #endif // DEBUG_NON_DETERMINISTIC_ASSERT
 };
 
 #endif // SkReadBuffer_DEFINED