Cleanup: Remove unneeded forward declararations in net.

net/spdy/spdy_session_pool.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_SPDY_SPDY_SESSION_POOL_H_
 #define NET_SPDY_SPDY_SESSION_POOL_H_
 #pragma once
 
 #include <map>
 #include <list>
@@ skipping 13 matching lines @@
 #include "net/proxy/proxy_config.h"
 #include "net/proxy/proxy_server.h"
 #include "net/spdy/spdy_settings_storage.h"
 
 namespace net {
 
 class AddressList;
 class BoundNetLog;
 class ClientSocketHandle;
 class HostResolver;
-class HttpNetworkSession;
 class SpdySession;
 
 // This is a very simple pool for open SpdySessions.
 class NET_EXPORT SpdySessionPool
     : public NetworkChangeNotifier::IPAddressObserver,
       public SSLConfigService::Observer,
       public CertDatabase::Observer {
  public:
   SpdySessionPool(HostResolver* host_resolver,
                   SSLConfigService* ssl_config_service);
@@ skipping 142 matching lines @@
 
   // Defaults to true. May be controlled via SpdySessionPoolPeer for tests.
   bool verify_domain_authentication_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdySessionPool);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_POOL_H_