First patch in making destructors of refcounted objects private.

base/message_loop_unittest.cc

Index: base/message_loop_unittest.cc
===================================================================
--- base/message_loop_unittest.cc	(revision 30973)
+++ base/message_loop_unittest.cc	(working copy)
@@ -67,6 +67,10 @@
   const std::string& result() const { return result_; }
 
  private:
+  friend class base::RefCounted<Foo>;
+
+  ~Foo() {}
+
   int test_count_;
   std::string result_;
 };
@@ -76,6 +80,11 @@
   void QuitNow() {
     MessageLoop::current()->Quit();
   }
+
+ private:
+  friend class base::RefCounted<QuitMsgLoop>;
+
+  ~QuitMsgLoop() {}
 };
 
 void RunTest_PostTask(MessageLoop::Type message_loop_type) {