Take extensions out of Profile into a profile-keyed service, ExtensionSystem.

chrome/browser/profiles/profile_manager.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 <set>
 
 #include "chrome/browser/profiles/profile_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/default_apps_trial.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/webui/sync_promo/sync_promo_ui.h"
@@ skipping 571 matching lines @@
 
   ProfileMetrics::LogNumberOfProfiles(this, ProfileMetrics::ADD_PROFILE_EVENT);
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_PROFILE_ADDED,
       content::Source<Profile>(profile),
       content::NotificationService::NoDetails());
 
 }
 
 void ProfileManager::DoFinalInitForServices(Profile* profile,
-                                         bool go_off_the_record) {
+                                            bool go_off_the_record) {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-  profile->InitExtensions(!go_off_the_record);
+  ExtensionSystemFactory::GetForProfile(profile)->Init(!go_off_the_record);
   if (!command_line.HasSwitch(switches::kDisableWebResources))
     profile->InitPromoResources();
 }
 
 void ProfileManager::DoFinalInitLogging(Profile* profile) {
   // Count number of extensions in this profile.
   int extension_count = -1;
   ExtensionService* extension_service = profile->GetExtensionService();
   if (extension_service)
     extension_count = extension_service->GetAppIds().size();
@@ skipping 299 matching lines @@
     AddProfileToCache(profile);
   }
 }
 
 void ProfileManager::RunCallbacks(const std::vector<CreateCallback>& callbacks,
                                   Profile* profile,
                                   Profile::CreateStatus status) {
   for (size_t i = 0; i < callbacks.size(); ++i)
     callbacks[i].Run(profile, status);
 }