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

chrome/browser/extensions/extension_event_router.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/extensions/extension_event_router.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_processes_api.h"
 #include "chrome/browser/extensions/extension_processes_api_constants.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/extensions/extension_tabs_module.h"
 #include "chrome/browser/extensions/api/webrequest/webrequest_api.h"
 #include "chrome/browser/extensions/process_map.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_view_type.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/extensions/api/extension_api.h"
@@ skipping 61 matching lines @@
                                          const GURL& event_url) {
   ListValue args;
   args.Set(0, Value::CreateStringValue(event_name));
   args.Set(1, Value::CreateStringValue(event_args));
   ipc_sender->Send(new ExtensionMsg_MessageInvoke(MSG_ROUTING_CONTROL,
       extension_id, kDispatchEvent, args, event_url));
 }
 
 ExtensionEventRouter::ExtensionEventRouter(Profile* profile)
     : profile_(profile),
-      extension_devtools_manager_(profile->GetExtensionDevToolsManager()) {
+      extension_devtools_manager_(
+          ExtensionSystemFactory::GetForProfile(profile)->devtools_manager()) {
   registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
                  content::NotificationService::AllSources());
   registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                  content::NotificationService::AllSources());
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING,
                  content::Source<Profile>(profile_));
   // TODO(tessamac): also get notified for background page crash/failure.
 }
 
 ExtensionEventRouter::~ExtensionEventRouter() {}
@@ skipping 317 matching lines @@
         DispatchPendingEvents(eh->extension_id());
       }
       break;
     }
     // TODO(tessamac): if background page crashed/failed clear queue.
     default:
       NOTREACHED();
       return;
   }
 }