chrome: Cleanup class/struct forward declarations

chrome/browser/net/chrome_network_delegate.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_NET_CHROME_NETWORK_DELEGATE_H_
 #define CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/net/safe_search_util.h"
 #include "components/prefs/pref_member.h"
 #include "net/base/network_delegate_impl.h"
 
 class ChromeExtensionsNetworkDelegate;
 class PrefService;
 
 template<class T> class PrefMember;
 
 typedef PrefMember<bool> BooleanPrefMember;
 
-namespace base {
-class Value;
-}
-
 namespace content_settings {
 class CookieSettings;
 }
 
 namespace data_usage {
 class DataUseAggregator;
 }
 
 namespace domain_reliability {
 class DomainReliabilityMonitor;
@@ skipping 172 matching lines @@
 
   // Aggregates and reports network usage.
   data_usage::DataUseAggregator* data_use_aggregator_;
   // Controls whether network usage is reported as being off the record.
   bool is_data_usage_off_the_record_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeNetworkDelegate);
 };
 
 #endif  // CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_