NetLogEventParameter to Callback refactoring 4.

net/udp/udp_net_log_parameters.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 NET_UDP_UDP_DATA_TRANSFER_PARAM_H_
-#define NET_UDP_UDP_DATA_TRANSFER_PARAM_H_
+#ifndef NET_UDP_UDP_NET_LOG_PARAMETERS_H_
+#define NET_UDP_UDP_NET_LOG_PARAMETERS_H_
 #pragma once
 
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
 #include "net/base/net_log.h"
 
 namespace net {
 
 class IPEndPoint;
 
-// NetLog parameter to describe a UDP receive/send event.  Each event has a
-// byte count, and may optionally have transferred bytes and an IPEndPoint as
-// well.
-class UDPDataTransferNetLogParam : public NetLog::EventParameters {
- public:
-  // |bytes| are only logged when |log_bytes| is non-NULL.
-  // |address| may be NULL.
-  UDPDataTransferNetLogParam(int byte_count,
-                             const char* bytes,
-                             bool log_bytes,
-                             const IPEndPoint* address);
+// Creates a NetLog callback that returns parameters describing a UDP
+// receive/send event.  |bytes| are only logged when byte logging is
+// enabled.  |address| may be NULL.  |address| (if given) and |bytes|
+// must be valid for the life of the callback.
+NetLog::ParametersCallback CreateNetLogUDPDataTranferCallback(
+    int byte_count,
+    const char* bytes,
+    const IPEndPoint* address);
 
-  virtual base::Value* ToValue() const OVERRIDE;
-
- protected:
-  virtual ~UDPDataTransferNetLogParam();
-
- private:
-  const int byte_count_;
-  const std::string hex_encoded_bytes_;
-  scoped_ptr<IPEndPoint> address_;
-};
+// Creates a NetLog callback that returns parameters describing a UDP
+// connect event.  |address| cannot be NULL, and must remain valid for
+// the lifetime of the callback.
+NetLog::ParametersCallback CreateNetLogUDPConnectCallback(
+    const IPEndPoint* address);
 
 }  // namespace net
 
-#endif  // NET_UDP_UDP_DATA_TRANSFER_PARAM_H_
+#endif  // NET_UDP_UDP_NET_LOG_PARAMETERS_H_