Cleanup: Remove unneeded forward declararations in net.

net/socket/ssl_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_SSL_SERVER_SOCKET_H_
 #define NET_SOCKET_SSL_SERVER_SOCKET_H_
 
 #include "base/basictypes.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "net/socket/stream_socket.h"
 
 namespace base {
 class StringPiece;
 }  // namespace base
 
 namespace crypto {
 class RSAPrivateKey;
 }  // namespace crypto
 
 namespace net {
 
-class IOBuffer;
 struct SSLConfig;
 class X509Certificate;
 
 class SSLServerSocket : public StreamSocket {
  public:
   virtual ~SSLServerSocket() {}
 
   // Perform the SSL server handshake, and notify the supplied callback
   // if the process completes asynchronously.  If Disconnect is called before
   // completion then the callback will be silently, as for other StreamSocket
@@ skipping 22 matching lines @@
 // returned socket.
 NET_EXPORT SSLServerSocket* CreateSSLServerSocket(
     StreamSocket* socket,
     X509Certificate* certificate,
     crypto::RSAPrivateKey* key,
     const SSLConfig& ssl_config);
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_SERVER_SOCKET_H_