RefCounted types should not have public destructors, net/

net/cookies/cookie_monster.h

Index: net/cookies/cookie_monster.h
diff --git a/net/cookies/cookie_monster.h b/net/cookies/cookie_monster.h
index f6485665983e9acfd36927926d3c049c39dff346..4620a2b5353a97a028bef10f06c5d246d429fbd6 100644
--- a/net/cookies/cookie_monster.h
+++ b/net/cookies/cookie_monster.h
@@ -927,8 +927,6 @@ typedef base::RefCountedThreadSafe<CookieMonster::PersistentCookieStore>
 class CookieMonster::PersistentCookieStore
     : public RefcountedPersistentCookieStore {
  public:
-  virtual ~PersistentCookieStore() {}
-
   typedef base::Callback<void(const std::vector<
       CookieMonster::CanonicalCookie*>&)> LoadedCallback;
 
@@ -957,7 +955,10 @@ class CookieMonster::PersistentCookieStore
   virtual void Flush(const base::Closure& callback) = 0;
 
  protected:
+  friend class base::RefCountedThreadSafe<PersistentCookieStore>;
+
   PersistentCookieStore() {}
+  virtual ~PersistentCookieStore() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PersistentCookieStore);