Move enable extensions define to a build flag.

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 10 matching lines @@
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string_piece.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "chrome/browser/net/chrome_network_delegate.h"
 #include "chrome/common/features.h"
 #include "components/prefs/pref_member.h"
 #include "components/ssl_config/ssl_config_service_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/browser_thread_delegate.h"
+#include "extensions/features/features.h"
 #include "net/base/network_change_notifier.h"
 #include "net/http/http_network_session.h"
 
 class PrefProxyConfigTracker;
 class PrefService;
 class PrefRegistrySimple;
 class SystemURLRequestContextGetter;
 
 #if BUILDFLAG(ANDROID_JAVA_UI)
 namespace chrome {
@@ skipping 135 matching lines @@
     std::unique_ptr<net::ProxyService> system_proxy_service;
     std::unique_ptr<net::HttpNetworkSession> system_http_network_session;
     std::unique_ptr<net::HttpTransactionFactory>
         system_http_transaction_factory;
     std::unique_ptr<net::URLRequestJobFactory> system_url_request_job_factory;
     std::unique_ptr<net::URLRequestContext> system_request_context;
     SystemRequestContextLeakChecker system_request_context_leak_checker;
     // |system_cookie_store| and |system_channel_id_service| are shared
     // between |proxy_script_fetcher_context| and |system_request_context|.
     std::unique_ptr<net::CookieStore> system_cookie_store;
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     scoped_refptr<extensions::EventRouterForwarder>
         extension_event_router_forwarder;
 #endif
     std::unique_ptr<net::HostMappingRules> host_mapping_rules;
     std::unique_ptr<net::HttpUserAgentSettings> http_user_agent_settings;
     std::unique_ptr<net::NetworkQualityEstimator> network_quality_estimator;
 
     // NetErrorTabHelper uses |dns_probe_service| to send DNS probes when a
     // main frame load fails with a DNS error in order to provide more useful
     // information to the renderer so it can show a more specific error page.
@@ skipping 91 matching lines @@
   void ChangedToOnTheRecordOnIOThread();
 
   void UpdateDnsClientEnabled();
   void UpdateServerWhitelist();
   void UpdateDelegateWhitelist();
   void UpdateAndroidAuthNegotiateAccountType();
   void UpdateNegotiateDisableCnameLookup();
   void UpdateNegotiateEnablePort();
 
   extensions::EventRouterForwarder* extension_event_router_forwarder() {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     return extension_event_router_forwarder_;
 #else
     return NULL;
 #endif
   }
   static net::URLRequestContext* ConstructSystemRequestContext(
       IOThread::Globals* globals,
       const net::HttpNetworkSession::Params& params,
       net::NetLog* net_log);
 
@@ skipping 10 matching lines @@
   // See IOThread::Globals for details.
   static net::URLRequestContext* ConstructProxyScriptFetcherContext(
       IOThread::Globals* globals,
       const net::HttpNetworkSession::Params& params,
       net::NetLog* net_log);
 
   // The NetLog is owned by the browser process, to allow logging from other
   // threads during shutdown, but is used most frequently on the IOThread.
   net_log::ChromeNetLog* net_log_;
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   // The extensions::EventRouterForwarder allows for sending events to
   // extensions from the IOThread.
   extensions::EventRouterForwarder* extension_event_router_forwarder_;
 #endif
 
   // These member variables are basically global, but their lifetimes are tied
   // to the IOThread.  IOThread owns them all, despite not using scoped_ptr.
   // This is because the destructor of IOThread runs on the wrong thread.  All
   // member variables should be deleted in CleanUp().
 
@@ skipping 61 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_