net: Cleanup class/struct forward declarations

net/socket/stream_socket.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_SOCKET_STREAM_SOCKET_H_
 #define NET_SOCKET_STREAM_SOCKET_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "net/base/net_export.h"
 #include "net/socket/connection_attempts.h"
 #include "net/socket/next_proto.h"
 #include "net/socket/socket.h"
 
 namespace net {
 
-class AddressList;
 class IPEndPoint;
 class NetLogWithSource;
 class SSLInfo;
 
 class NET_EXPORT_PRIVATE StreamSocket : public Socket {
  public:
   ~StreamSocket() override {}
 
   // Called to establish a connection.  Returns OK if the connection could be
   // established synchronously.  Otherwise, ERR_IO_PENDING is returned and the
@@ skipping 121 matching lines @@
     // identify the motivation.
     bool omnibox_speculation_;
     bool subresource_speculation_;
     DISALLOW_COPY_AND_ASSIGN(UseHistory);
   };
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_STREAM_SOCKET_H_