RefCounted types should not have public destructors, net/ edition

net/base/net_log.h

Index: net/base/net_log.h
diff --git a/net/base/net_log.h b/net/base/net_log.h
index 1984abf4339fad9581d5d6f51b055ad1bab440b0..777bdf54fe20a697bb34d2c887cff4a6848b4608 100644
--- a/net/base/net_log.h
+++ b/net/base/net_log.h
@@ -121,7 +121,6 @@ class NET_EXPORT NetLog {
     // Observers must stop watching a NetLog before either the Observer or the
     // NetLog is destroyed.
     ThreadSafeObserver();
-    virtual ~ThreadSafeObserver();
 
     // Returns the minimum log level for events this observer wants to
     // receive.  Must not be called when not watching a NetLog.
@@ -153,6 +152,9 @@ class NET_EXPORT NetLog {
                             EventPhase phase,
                             EventParameters* params) = 0;
 
+   protected:
+    virtual ~ThreadSafeObserver();
+
    private:
     friend class NetLog;