First patch in making destructors of refcounted objects private.

base/ref_counted_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "base/ref_counted.h"
 
 namespace {
 
 class SelfAssign : public base::RefCounted<SelfAssign> {
+  friend class base::RefCounted<SelfAssign>;
+
+  ~SelfAssign() {}
 };
 
 class CheckDerivedMemberAccess : public scoped_refptr<SelfAssign> {
  public:
   CheckDerivedMemberAccess() {
     // This shouldn't compile if we don't have access to the member variable.
     SelfAssign** pptr = &ptr_;
     EXPECT_EQ(*pptr, ptr_);
   }
 };
 
 }  // end namespace
 
 TEST(RefCountedUnitTest, TestSelfAssignment) {
   SelfAssign* p = new SelfAssign;
   scoped_refptr<SelfAssign> var = p;
   var = var;
   EXPECT_EQ(var.get(), p);
 }
 
 TEST(RefCountedUnitTest, ScopedRefPtrMemberAccess) {
   CheckDerivedMemberAccess check;
 }