net: Cleanup class/struct forward declarations

net/proxy/proxy_service.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_PROXY_PROXY_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 18 matching lines @@
 class GURL;
 
 namespace base {
 class SingleThreadTaskRunner;
 class TimeDelta;
 }  // namespace base
 
 namespace net {
 
 class DhcpProxyScriptFetcher;
-class HostResolver;
 class NetLog;
 class NetLogWithSource;
 class ProxyDelegate;
 class ProxyResolver;
 class ProxyResolverFactory;
 class ProxyResolverScriptData;
-class ProxyScriptDecider;
 class ProxyScriptFetcher;
 
 // This class can be used to resolve the proxy server to use when loading a
 // HTTP(S) URL.  It uses the given ProxyResolver to handle the actual proxy
 // resolution.  See ProxyResolverV8 for example.
 class NET_EXPORT ProxyService : public NetworkChangeNotifier::IPAddressObserver,
                                 public NetworkChangeNotifier::DNSObserver,
                                 public ProxyConfigService::Observer,
                                 NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
@@ skipping 424 matching lines @@
 
   // The method to use for sanitizing URLs seen by the proxy resolver.
   SanitizeUrlPolicy sanitize_url_policy_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_