Add NetLog support to UDP sockets.

net/udp/udp_data_transfer_param.h

+// Copyright (c) 2011 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_
+#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);
+  virtual ~UDPDataTransferNetLogParam();
+
+  virtual base::Value* ToValue() const OVERRIDE;
+
+ private:
+  const int byte_count_;
+  const std::string hex_encoded_bytes_;
+  scoped_ptr<IPEndPoint> address_;
+};
+
+}  // namespace net
+
+#endif  // NET_BASE_ADDRESS_LIST_NET_LOG_PARAM_H_