net: Cleanup class/struct forward declarations

net/spdy/spdy_session_pool.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_SPDY_SPDY_SESSION_POOL_H_
 #define NET_SPDY_SPDY_SESSION_POOL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 10 matching lines @@
 #include "net/base/net_export.h"
 #include "net/base/network_change_notifier.h"
 #include "net/cert/cert_database.h"
 #include "net/proxy/proxy_config.h"
 #include "net/proxy/proxy_server.h"
 #include "net/spdy/spdy_session_key.h"
 #include "net/ssl/ssl_config_service.h"
 
 namespace net {
 
-class AddressList;
 class ClientSocketHandle;
 class HostResolver;
 class HttpServerProperties;
 class NetLogWithSource;
 class ProxyDelegate;
 class SpdySession;
 class TransportSecurityState;
 
 // This is a very simple pool for open SpdySessions.
 class NET_EXPORT SpdySessionPool
@@ skipping 181 matching lines @@
   // resources from origins that are different from those of their associated
   // streams. May be nullptr.
   ProxyDelegate* proxy_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdySessionPool);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_POOL_H_