RefCounted types should not have public destructors, net/

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 707c3216f8296cdf656a1fbbfcd2122a6bfd4611..1984abf4339fad9581d5d6f51b055ad1bab440b0 100644
--- a/net/base/net_log.h
+++ b/net/base/net_log.h
@@ -78,14 +78,18 @@ class NET_EXPORT NetLog {
       : public base::RefCountedThreadSafe<EventParameters> {
    public:
     EventParameters() {}
-    virtual ~EventParameters() {}
 
     // Serializes the parameters to a Value tree. This is intended to be a
     // lossless conversion, which is used to serialize the parameters to JSON.
     // The caller takes ownership of the returned Value*.
     virtual base::Value* ToValue() const = 0;
 
+   protected:
+    virtual ~EventParameters() {}
+
    private:
+    friend class base::RefCountedThreadSafe<EventParameters>;
+
     DISALLOW_COPY_AND_ASSIGN(EventParameters);
   };
 
@@ -321,7 +325,6 @@ class NET_EXPORT NetLogStringParameter : public NetLog::EventParameters {
  public:
   // |name| must be a string literal.
   NetLogStringParameter(const char* name, const std::string& value);
-  virtual ~NetLogStringParameter();
 
   const std::string& value() const {
     return value_;
@@ -329,6 +332,9 @@ class NET_EXPORT NetLogStringParameter : public NetLog::EventParameters {
 
   virtual base::Value* ToValue() const OVERRIDE;
 
+ protected:
+  virtual ~NetLogStringParameter();
+
  private:
   const char* const name_;
   const std::string value_;
@@ -348,6 +354,9 @@ class NET_EXPORT NetLogIntegerParameter : public NetLog::EventParameters {
 
   virtual base::Value* ToValue() const OVERRIDE;
 
+ protected:
+  virtual ~NetLogIntegerParameter() {}
+
  private:
   const char* name_;
   const int value_;
@@ -367,6 +376,9 @@ class NET_EXPORT NetLogSourceParameter : public NetLog::EventParameters {
 
   virtual base::Value* ToValue() const OVERRIDE;
 
+ protected:
+  virtual ~NetLogSourceParameter() {}
+
  private:
   const char* name_;
   const NetLog::Source value_;