Expanded distribution of instance counting

http://codereview.appspot.com/6300114/



git-svn-id: http://skia.googlecode.com/svn/trunk@4291 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkDrawFilter.h b/include/core/SkDrawFilter.h
index 303b80e..39b1717 100644
--- a/include/core/SkDrawFilter.h
+++ b/include/core/SkDrawFilter.h
@@ -38,6 +38,9 @@
      *  The implementation may modify the paint as they wish.
      */
     virtual void filter(SkPaint*, Type) = 0;
+
+private:
+    typedef SkRefCnt INHERITED;
 };
 
 #endif