Extracting NetLog inner classes into their own classes.

net/socket/tcp_server_socket.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_SOCKET_TCP_SERVER_SOCKET_H_
 #define NET_SOCKET_TCP_SERVER_SOCKET_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_export.h"
-#include "net/log/net_log.h"
 #include "net/socket/server_socket.h"
 #include "net/socket/tcp_socket.h"
 
 namespace net {
 
+class NetLog;
+struct NetLogSource;
+
 class NET_EXPORT TCPServerSocket : public ServerSocket {
  public:
-  TCPServerSocket(NetLog* net_log, const NetLog::Source& source);
+  TCPServerSocket(NetLog* net_log, const NetLogSource& source);
   ~TCPServerSocket() override;
 
   // net::ServerSocket implementation.
   int Listen(const IPEndPoint& address, int backlog) override;
   int GetLocalAddress(IPEndPoint* address) const override;
   int Accept(std::unique_ptr<StreamSocket>* socket,
              const CompletionCallback& callback) override;
 
   // Detachs from the current thread, to allow the socket to be transferred to
   // a new thread. Should only be called when the object is no longer used by
@@ skipping 18 matching lines @@
   std::unique_ptr<TCPSocket> accepted_socket_;
   IPEndPoint accepted_address_;
   bool pending_accept_;
 
   DISALLOW_COPY_AND_ASSIGN(TCPServerSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_SERVER_SOCKET_H_