RefCounted types should not have public destructors

chrome/browser/extensions/api/socket/socket_api.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_API_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/api/api_function.h"
 #include "chrome/common/extensions/api/experimental_socket.h"
 #include "net/base/io_buffer.h"
 
 #include <string>
 
 namespace extensions {
 
 class APIResourceController;
 class APIResourceEventNotifier;
 
 extern const char kBytesWrittenKey[];
 extern const char kSocketIdKey[];
 extern const char kUdpSocketType[];
 
 class SocketExtensionFunction : public AsyncAPIFunction {
- public:
+ protected:
+  virtual ~SocketExtensionFunction() {}
+
+  // AsyncAPIFunction:
   virtual void Work() OVERRIDE;
   virtual bool Respond() OVERRIDE;
 };
 
 // Many of these socket functions are synchronous in the sense that
 // they don't involve blocking operations, but we've made them all
 // AsyncExtensionFunctions because the underlying UDPClientSocket
 // library wants all operations to happen on the same thread as the
 // one that created the socket. Too bad.
 
@@ skipping 64 matching lines @@
 
   // AsyncAPIFunction:
   virtual bool Prepare() OVERRIDE;
   virtual void Work() OVERRIDE;
 
  private:
   int socket_id_;
 };
 
 class SocketBindFunction : public SocketExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.socket.bind")
+
  protected:
+  virtual ~SocketBindFunction() {}
+
+  // AsyncAPIFunction:
   virtual bool Prepare() OVERRIDE;
   virtual void Work() OVERRIDE;
 
  private:
   int socket_id_;
   std::string address_;
   int port_;
-
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.socket.bind")
 };
 
 class SocketReadFunction : public SocketExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.socket.read")
 
   SocketReadFunction();
 
  protected:
   virtual ~SocketReadFunction();
@@ skipping 66 matching lines @@
   int socket_id_;
   scoped_refptr<net::IOBuffer> io_buffer_;
   size_t io_buffer_size_;
   std::string address_;
   int port_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_API_H_