[ios] Add session saving support to clean skeleton.

ios/chrome/browser/browser_state/browser_state_keyed_service_factories.mm

 // Copyright 2015 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 "ios/chrome/browser/browser_state/browser_state_keyed_service_factories.h"
 
 #include "ios/chrome/browser/autocomplete/autocomplete_classifier_factory.h"
 #include "ios/chrome/browser/autocomplete/in_memory_url_index_factory.h"
 #include "ios/chrome/browser/autocomplete/shortcuts_backend_factory.h"
 #include "ios/chrome/browser/autofill/personal_data_manager_factory.h"
@@ skipping 28 matching lines @@
 #include "ios/chrome/browser/signin/gaia_cookie_manager_service_factory.h"
 #include "ios/chrome/browser/signin/oauth2_token_service_factory.h"
 #include "ios/chrome/browser/signin/signin_client_factory.h"
 #include "ios/chrome/browser/signin/signin_error_controller_factory.h"
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/browser/suggestions/suggestions_service_factory.h"
 #include "ios/chrome/browser/sync/sync_setup_service_factory.h"
 #include "ios/chrome/browser/translate/translate_accept_languages_factory.h"
 #include "ios/chrome/browser/undo/bookmark_undo_service_factory.h"
 #include "ios/chrome/browser/web_data_service_factory.h"
+#include "ios/shared/chrome/browser/ui/browser_list/browser_list_session_service_factory.h"

[sdefresne, 2017/05/04 14:52:35]

I'm still unconvinced the BrowserList is part of UI and think it is part of
model.

[marq (ping after 24h), 2017/05/09 10:18:59]

To me, it's "model" code in that it doesn't directly implement UI, but it's the
model representation of UI state (which tabs are grouped together). So
conceptually it's the "ui model" (as opposed to "data model"). I'm open to
discussion on this, however.

[sdefresne, 2017/05/11 15:57:59]

It still seems strange that this is the only file from a /ui/ sub-directory
included in that file.

In addition, desktop make a difference between a Browser and a BrowserWindow
(Browser is model, BrowserWindow is UI and wraps a Browser, with lots of
intermediate classes like BrowserView and BrowserFrame).

[rohitrao (ping after 24h), 2017/05/15 11:56:03]

It owns Browser, which in turn owns a dispatcher and a broadcaster.  I think
both of those are solidly part of the UI, so we're in a weird state.  I do agree
that Browser and BrowserList are more model than ui, but I don't know how to
resolve this contradiction.

 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 // This method gets the instance of each ServiceFactory. We do this so that
 // each ServiceFactory initializes itself and registers its dependencies with
 // the global PreferenceDependencyManager. We need to have a complete
 // dependency graph when we create a browser state so we can dispatch the
 // browser state creation message to the services that want to create their
@@ skipping 20 matching lines @@
   ios::InMemoryURLIndexFactory::GetInstance();
   ios::ShortcutsBackendFactory::GetInstance();
   ios::SigninErrorControllerFactory::GetInstance();
   ios::SigninManagerFactory::GetInstance();
   ios::StartupTaskRunnerServiceFactory::GetInstance();
   ios::TemplateURLServiceFactory::GetInstance();
   ios::TopSitesFactory::GetInstance();
   ios::WebDataServiceFactory::GetInstance();
   ios::WebHistoryServiceFactory::GetInstance();
   AuthenticationServiceFactory::GetInstance();
+  BrowserListSessionServiceFactory::GetInstance();
   DesktopPromotionSyncServiceFactory::GetInstance();
   IOSChromeGCMProfileServiceFactory::GetInstance();
   IOSChromeLargeIconCacheFactory::GetInstance();
   IOSChromeLargeIconServiceFactory::GetInstance();
   IOSChromeFaviconLoaderFactory::GetInstance();
   IOSChromeContentSuggestionsServiceFactory::GetInstance();
   IOSChromePasswordManagerSettingMigratorServiceFactory::GetInstance();
   IOSChromePasswordStoreFactory::GetInstance();
   IOSChromeProfileInvalidationProviderFactory::GetInstance();
   GoogleLogoServiceFactory::GetInstance();
   OAuth2TokenServiceFactory::GetInstance();
   ReadingListModelFactory::GetInstance();
   SigninClientFactory::GetInstance();
   suggestions::SuggestionsServiceFactory::GetInstance();
   SyncSetupServiceFactory::GetInstance();
   TabRestoreServiceDelegateImplIOSFactory::GetInstance();
   TranslateAcceptLanguagesFactory::GetInstance();
 }