RefCounted types should not have public destructors, base/ edition

base/threading/sequenced_worker_pool_unittest.cc

Index: base/threading/sequenced_worker_pool_unittest.cc
diff --git a/base/threading/sequenced_worker_pool_unittest.cc b/base/threading/sequenced_worker_pool_unittest.cc
index 2becd0993c031025a25562dd8094cc61936419f7..7002a6bfcd069be15bde7594e1851b18aeb5b60e 100644
--- a/base/threading/sequenced_worker_pool_unittest.cc
+++ b/base/threading/sequenced_worker_pool_unittest.cc
@@ -77,6 +77,7 @@ class TestTracker : public base::RefCountedThreadSafe<TestTracker> {
   void FastTask(int id) {
     SignalWorkerDone(id);
   }
+
   void SlowTask(int id) {
     base::PlatformThread::Sleep(base::TimeDelta::FromSeconds(1));
     SignalWorkerDone(id);
@@ -126,6 +127,9 @@ class TestTracker : public base::RefCountedThreadSafe<TestTracker> {
   }
 
  private:
+  friend class base::RefCountedThreadSafe<TestTracker>;
+  ~TestTracker() {}
+
   void SignalWorkerDone(int id) {
     {
       base::AutoLock lock(lock_);