Add enable_automation build switch.

chrome/browser/browser_process_impl.cc

 // 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.
 
 #include "chrome/browser/browser_process_impl.h"
 
 #include <map>
 #include <set>
 #include <vector>
 
@@ skipping 142 matching lines @@
   print_job_manager_->OnQuit();
   print_job_manager_.reset();
 #endif
 
   tracked_objects::ThreadData::EnsureCleanupWasCalled(4);
 
   g_browser_process = NULL;
 }
 
 void BrowserProcessImpl::StartTearDown() {
+#if defined(ENABLE_AUTOMATION)
   // Delete the AutomationProviderList before NotificationService,
   // since it may try to unregister notifications
   // Both NotificationService and AutomationProvider are singleton instances in
   // the BrowserProcess. Since AutomationProvider may have some active
   // notification observers, it is essential that it gets destroyed before the
   // NotificationService. NotificationService won't be destroyed until after
   // this destructor is run.
   automation_provider_list_.reset();
+#endif
 
   // We need to shutdown the SdchDictionaryFetcher as it regularly holds
   // a pointer to a URLFetcher, and that URLFetcher (upon destruction) will do
   // a PostDelayedTask onto the IO thread.  This shutdown call will both discard
   // any pending URLFetchers, and avoid creating any more.
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(&SdchDictionaryFetcher::Shutdown));
 
   // We need to destroy the MetricsService, GoogleURLTracker,
   // IntranetRedirectDetector, and SafeBrowsing ClientSideDetectionService
@@ skipping 247 matching lines @@
     CreateIconManager();
   return icon_manager_.get();
 }
 
 ThumbnailGenerator* BrowserProcessImpl::GetThumbnailGenerator() {
   return thumbnail_generator_.get();
 }
 
 AutomationProviderList* BrowserProcessImpl::GetAutomationProviderList() {
   DCHECK(CalledOnValidThread());
+#if defined(ENABLE_AUTOMATION)
   if (automation_provider_list_.get() == NULL)
     automation_provider_list_.reset(new AutomationProviderList());
   return automation_provider_list_.get();
+#else
+  return NULL;
+#endif
 }
 
 void BrowserProcessImpl::InitDevToolsHttpProtocolHandler(
     Profile* profile,
     const std::string& ip,
     int port,
     const std::string& frontend_url) {
   DCHECK(CalledOnValidThread());
   remote_debugging_server_.reset(
       new RemoteDebuggingServer(profile, ip, port, frontend_url));
@@ skipping 443 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)