RefCounted types should not have public destructors

base/memory/ref_counted.h

Index: base/memory/ref_counted.h
diff --git a/base/memory/ref_counted.h b/base/memory/ref_counted.h
index 64615f13dfa77fe8d2a596d2dfece7995dff11be..858ed2b196044f71109d668566b48f5f45e8be58 100644
--- a/base/memory/ref_counted.h
+++ b/base/memory/ref_counted.h
@@ -164,6 +164,10 @@ class RefCountedData : public base::RefCounted< base::RefCountedData<T> > {
   RefCountedData(const T& in_value) : data(in_value) {}
 
   T data;
+
+ private:
+  friend class base::RefCounted<base::RefCountedData<T> >;
+  ~RefCountedData() {}
 };
 
 }  // namespace base