Notify NQE of TCP RTT values

net/socket/tcp_client_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_CLIENT_SOCKET_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_H_
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/address_list.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "net/log/net_log.h"
 #include "net/socket/connection_attempts.h"
 #include "net/socket/stream_socket.h"
 #include "net/socket/tcp_socket.h"
 
 namespace net {
 
+class SocketPerformanceWatcher;
+
 // A client socket that uses TCP as the transport layer.
 class NET_EXPORT TCPClientSocket : public StreamSocket {
  public:
   // The IP address(es) and port number to connect to.  The TCP socket will try
   // each IP address in the list until it succeeds in establishing a
   // connection.
-  TCPClientSocket(const AddressList& addresses,
-                  net::NetLog* net_log,
-                  const net::NetLog::Source& source);
+  TCPClientSocket(
+      const AddressList& addresses,
+      scoped_ptr<SocketPerformanceWatcher> socket_performance_watcher,
+      net::NetLog* net_log,
+      const net::NetLog::Source& source);
 
   // Adopts the given, connected socket and then acts as if Connect() had been
   // called. This function is used by TCPServerSocket and for testing.
   TCPClientSocket(scoped_ptr<TCPSocket> connected_socket,
                   const IPEndPoint& peer_address);
 
   ~TCPClientSocket() override;
 
   // Binds the socket to a local IP address and port.
   int Bind(const IPEndPoint& address);
@@ skipping 56 matching lines @@
   void DidCompleteRead(const CompletionCallback& callback, int result);
   void DidCompleteWrite(const CompletionCallback& callback, int result);
   void DidCompleteReadWrite(const CompletionCallback& callback, int result);
 
   int OpenSocket(AddressFamily family);
 
   // Emits histograms for TCP metrics, at the time the socket is
   // disconnected.
   void EmitTCPMetricsHistogramsOnDisconnect();
 
+  // Socket performance statistics (such as RTT) are reported to the
+  // |socket_performance_watcher_|. May be nullptr.
+  SocketPerformanceWatcher* socket_performance_watcher_;
+
   scoped_ptr<TCPSocket> socket_;
 
   // Local IP address and port we are bound to. Set to NULL if Bind()
   // wasn't called (in that case OS chooses address/port).
   scoped_ptr<IPEndPoint> bind_address_;
 
   // The list of addresses we should try in order to establish a connection.
   AddressList addresses_;
 
   // Where we are in above list. Set to -1 if uninitialized.
@@ skipping 17 matching lines @@
 
   // Total number of bytes received by the socket.
   int64_t total_received_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_H_