ifdef extensions code in BrowserProcess, IOThread, and ChromeNetworkDelegate.

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 <string>
 #include <vector>
 
@@ skipping 137 matching lines @@
     // ProxyService, since we always directly connect to fetch the PAC script.
     scoped_ptr<net::URLRequestContext> proxy_script_fetcher_context;
     scoped_ptr<net::ProxyService> system_proxy_service;
     scoped_ptr<net::HttpTransactionFactory> system_http_transaction_factory;
     scoped_ptr<net::URLRequestJobFactory> system_url_request_job_factory;
     scoped_ptr<net::URLRequestContext> system_request_context;
     SystemRequestContextLeakChecker system_request_context_leak_checker;
     // |system_cookie_store| and |system_server_bound_cert_service| are shared
     // between |proxy_script_fetcher_context| and |system_request_context|.
     scoped_refptr<net::CookieStore> system_cookie_store;
+#if defined(ENABLE_EXTENSIONS)
     scoped_refptr<extensions::EventRouterForwarder>
         extension_event_router_forwarder;
+#endif
     scoped_ptr<net::HostMappingRules> host_mapping_rules;
     scoped_ptr<net::HttpUserAgentSettings> http_user_agent_settings;
     bool ignore_certificate_errors;
     uint16 testing_fixed_http_port;
     uint16 testing_fixed_https_port;
 
     Optional<size_t> initial_max_spdy_concurrent_streams;
     Optional<bool> force_spdy_single_domain;
     Optional<bool> enable_spdy_compression;
     Optional<bool> enable_spdy_ping_based_connection_checking;
@@ skipping 202 matching lines @@
   // Returns the alternate protocol probability threshold specified by
   // any flags in |command_line| or |quic_trial_params|.
   static double GetAlternateProtocolProbabilityThreshold(
       const base::CommandLine& command_line,
       const VariationParameters& quic_trial_params);
 
   // The NetLog is owned by the browser process, to allow logging from other
   // threads during shutdown, but is used most frequently on the IOThread.
   ChromeNetLog* net_log_;
 
+#if defined(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().
 
   // These member variables are initialized in Init() and do not change for the
   // lifetime of the IO thread.
 
   Globals* globals_;
@@ skipping 33 matching lines @@
   bool is_spdy_disabled_by_policy_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   const base::TimeTicks creation_time_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_