RefCounted types should not have public destructors, base/ edition

base/threading/non_thread_safe.h

Index: base/threading/non_thread_safe.h
diff --git a/base/threading/non_thread_safe.h b/base/threading/non_thread_safe.h
index 3f60fed8890f517ccf89a206433d6887481fb32e..8609ccb0ac0c361d37a6d749ac0750f7c44d564c 100644
--- a/base/threading/non_thread_safe.h
+++ b/base/threading/non_thread_safe.h
@@ -29,6 +29,7 @@ class NonThreadSafeDoNothing {
   }
 
  protected:
+  ~NonThreadSafeDoNothing() {}
   void DetachFromThread() {}
 };
 
@@ -51,11 +52,9 @@ class NonThreadSafeDoNothing {
 // In Release mode, CalledOnValidThread will always return true.
 //
 #ifndef NDEBUG
-class NonThreadSafe : public NonThreadSafeImpl {
-};
+typedef NonThreadSafeImpl NonThreadSafe;
 #else
-class NonThreadSafe : public NonThreadSafeDoNothing {
-};
+typedef NonThreadSafeDoNothing NonThreadSafe;
 #endif  // NDEBUG
 
 }  // namespace base