Move IOThread::LoggingNetworkChangeObserver to net/base

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 56 matching lines @@
 class CookieStore;
 class CTLogVerifier;
 class FtpTransactionFactory;
 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;
 class TransportSecurityState;
 class URLRequestBackoffManager;
 class URLRequestContext;
 class URLRequestContextGetter;
 class URLRequestJobFactory;
@@ skipping 425 matching lines @@
 
   // These member variables are initialized in Init() and do not change for the
   // lifetime of the IO thread.
 
   Globals* globals_;
 
   net::HttpNetworkSession::Params params_;
   NetworkSessionConfigurator network_session_configurator_;
 
   // Observer that logs network changes to the ChromeNetLog.
-  class LoggingNetworkChangeObserver;
-  std::unique_ptr<LoggingNetworkChangeObserver> network_change_observer_;
+  std::unique_ptr<net::LoggingNetworkChangeObserver> network_change_observer_;
 
   BooleanPrefMember system_enable_referrers_;
 
   BooleanPrefMember dns_client_enabled_;
 
   BooleanPrefMember quick_check_enabled_;
 
   // Store HTTP Auth-related policies in this thread.
   // TODO(aberent) Make the list of auth schemes a PrefMember, so that the
   // policy can change after startup (https://crbug/549273).
@@ skipping 38 matching lines @@
   // Callback for updating data use prefs which needs to be initialized on UI
   // thread and passed to |ChromeNetworkDelegate|.
   metrics::UpdateUsagePrefCallbackType metrics_data_use_forwarder_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_