Remove SkAutoTUnref and SkAutoTDelete from public includes.

include/core/SkWriteBuffer.h

Index: include/core/SkWriteBuffer.h
diff --git a/include/core/SkWriteBuffer.h b/include/core/SkWriteBuffer.h
index 29f923fedd187d03c0050691600fe696754c9c1a..a104ffcb1f9039b29dcc4b6d760ebe12d8dbe68b 100644
--- a/include/core/SkWriteBuffer.h
+++ b/include/core/SkWriteBuffer.h
@@ -134,12 +134,10 @@ public:
      * Set an SkPixelSerializer to store an encoded representation of pixels,
      * e.g. SkBitmaps.
      *
-     * Calls ref() on the serializer.
-     *
      * TODO: Encode SkImage pixels as well.
      */
-    void setPixelSerializer(SkPixelSerializer*);
-    SkPixelSerializer* getPixelSerializer() const { return fPixelSerializer; }
+    void setPixelSerializer(sk_sp<SkPixelSerializer>);
+    SkPixelSerializer* getPixelSerializer() const { return fPixelSerializer.get(); }
 
 private:
     const uint32_t fFlags;
@@ -148,7 +146,7 @@ private:
 
     SkRefCntSet* fTFSet;
 
-    SkAutoTUnref<SkPixelSerializer> fPixelSerializer;
+    sk_sp<SkPixelSerializer> fPixelSerializer;
 
     // Only used if we do not have an fFactorySet
     SkTHashMap<SkString, uint32_t> fFlattenableDict;