chrome: Cleanup class/struct forward declarations

chrome/browser/io_thread.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 CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 60 matching lines @@
 }
 
 namespace net {
 class CTPolicyEnforcer;
 class CertVerifier;
 class ChannelIDService;
 class CookieStore;
 class CTLogVerifier;
 class HostMappingRules;
 class HostResolver;
-class HttpAuthHandlerRegistryFactory;
 class HttpAuthPreferences;
 class HttpServerProperties;
 class HttpTransactionFactory;
 class HttpUserAgentSettings;
 class LoggingNetworkChangeObserver;
 class NetworkDelegate;
 class NetworkQualityEstimator;
 class ProxyConfigService;
 class ProxyService;
 class SSLConfigService;
@@ skipping 311 matching lines @@
   // Callback for updating data use prefs which needs to be initialized on UI
   // thread and passed to |DataUseNetworkDelegate|.
   metrics::UpdateUsagePrefCallbackType metrics_data_use_forwarder_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_