Add enable_automation build switch.

chrome/browser/browser_process_impl.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.
 
 // When each service is created, we set a flag indicating this. At this point,
 // the service initialization could fail or succeed. This allows us to remember
 // if we tried to create a service, and not try creating it over and over if
 // the creation failed.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
@@ skipping 169 matching lines @@
       print_preview_tab_controller_;
 
   scoped_ptr<printing::BackgroundPrintingManager> background_printing_manager_;
 
   scoped_ptr<ui::Clipboard> clipboard_;
 
   // Manager for desktop notification UI.
   bool created_notification_ui_manager_;
   scoped_ptr<NotificationUIManager> notification_ui_manager_;
 
+#if defined(ENABLE_AUTOMATION)
   scoped_ptr<AutomationProviderList> automation_provider_list_;
+#endif
 
   scoped_ptr<GoogleURLTracker> google_url_tracker_;
   scoped_ptr<IntranetRedirectDetector> intranet_redirect_detector_;
 
   scoped_ptr<TabCloseableStateWatcher> tab_closeable_state_watcher_;
 
   scoped_ptr<StatusTray> status_tray_;
 
   scoped_ptr<BackgroundModeManager> background_mode_manager_;
 
@@ skipping 60 matching lines @@
 #endif
 
   // TODO(eroman): Remove this when done debugging 113031. This tracks
   // the callstack which released the final module reference count.
   base::debug::StackTrace release_last_reference_callstack_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_