Use mojo volume interfaces for mash and classic ash.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 2013 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/chromeos/chrome_browser_main_chromeos.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 27 matching lines @@
 #include "chrome/browser/chromeos/dbus/chrome_console_service_provider_delegate.h"
 #include "chrome/browser/chromeos/dbus/chrome_display_power_service_provider_delegate.h"
 #include "chrome/browser/chromeos/dbus/chrome_proxy_resolver_delegate.h"
 #include "chrome/browser/chromeos/dbus/kiosk_info_service_provider.h"
 #include "chrome/browser/chromeos/dbus/screen_lock_service_provider.h"
 #include "chrome/browser/chromeos/display/quirks_manager_delegate_impl.h"
 #include "chrome/browser/chromeos/events/event_rewriter.h"
 #include "chrome/browser/chromeos/events/event_rewriter_controller.h"
 #include "chrome/browser/chromeos/events/keyboard_driven_event_rewriter.h"
 #include "chrome/browser/chromeos/extensions/default_app_order.h"
+#include "chrome/browser/chromeos/extensions/extension_system_event_observer.h"
 #include "chrome/browser/chromeos/external_metrics.h"
 #include "chrome/browser/chromeos/input_method/input_method_configuration.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
 #include "chrome/browser/chromeos/login/login_wizard.h"
 #include "chrome/browser/chromeos/login/quick_unlock/pin_storage.h"
 #include "chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
@@ skipping 605 matching lines @@
   bool is_running_test = parameters().ui_task != nullptr;
   g_browser_process->platform_part()->InitializeSessionManager(
       parsed_command_line(), profile(), is_running_test);
   g_browser_process->platform_part()->SessionManager()->Start();
 
   // Guest user profile is never initialized with locale settings,
   // so we need special handling for Guest session.
   if (user_manager::UserManager::Get()->IsLoggedInAsGuest())
     SetGuestLocale(profile());
 
+  // This observer uses the intialized profile to dispatch extension events.
+  extension_system_event_observer_.reset(new ExtensionSystemEventObserver());

[sky, 2016/10/20 15:41:07]

MakeUnique if you can.

[msw, 2016/10/20 16:15:32]

Done here and elsewhere in this function.

+
   peripheral_battery_observer_.reset(new PeripheralBatteryObserver());
 
   renderer_freezer_.reset(
       new RendererFreezer(std::unique_ptr<RendererFreezer::Delegate>(
           new FreezerCgroupProcessManager())));
 
   g_browser_process->platform_part()->InitializeAutomaticRebootManager();
   g_browser_process->platform_part()->InitializeDeviceDisablingManager();
 
   // This observer cannot be created earlier because it requires the shell to be
@@ skipping 108 matching lines @@
   // depend on.
   data_promo_notification_.reset();
 
   // Tell DeviceSettingsService to stop talking to session_manager. Do not
   // shutdown DeviceSettingsService yet, it might still be accessed by
   // BrowserPolicyConnector (owned by g_browser_process).
   DeviceSettingsService::Get()->UnsetSessionManager();
 
   // We should remove observers attached to D-Bus clients before
   // DBusThreadManager is shut down.
+  extension_system_event_observer_.reset();
   peripheral_battery_observer_.reset();
   power_prefs_.reset();
   renderer_freezer_.reset();
   wake_on_wifi_manager_.reset();
   ScreenLocker::ShutDownClass();
   keyboard_event_rewriters_.reset();
   low_disk_notification_.reset();
 #if defined(USE_X11)
   if (!chrome::IsRunningInMash()) {
     // The XInput2 event listener needs to be shut down earlier than when
@@ skipping 78 matching lines @@
   // Destroy DBus services immediately after threads are stopped.
   dbus_services_.reset();
 
   ChromeBrowserMainPartsLinux::PostDestroyThreads();
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 }  //  namespace chromeos