Allow SessionService to be disabled.

chrome/browser/profiles/profile_dependency_manager.cc

Index: chrome/browser/profiles/profile_dependency_manager.cc
diff --git a/chrome/browser/profiles/profile_dependency_manager.cc b/chrome/browser/profiles/profile_dependency_manager.cc
index 726c3cd136d97b9f2b67f83e505c4c65fcf34501..97579174fdd39a02e0443bac40658b1add95c9ec 100644
--- a/chrome/browser/profiles/profile_dependency_manager.cc
+++ b/chrome/browser/profiles/profile_dependency_manager.cc
@@ -167,13 +167,7 @@ void ProfileDependencyManager::AssertFactoriesBuilt() {
     return;
 
   BackgroundContentsServiceFactory::GetInstance();
-#if !defined(OS_ANDROID)
-  CloudPrintProxyServiceFactory::GetInstance();
-#endif
   CookieSettings::Factory::GetInstance();
-#if defined(ENABLE_NOTIFICATIONS)
-  DesktopNotificationServiceFactory::GetInstance();
-#endif
   DownloadServiceFactory::GetInstance();
   FindBarStateFactory::GetInstance();
   GlobalErrorServiceFactory::GetInstance();
@@ -181,28 +175,34 @@ void ProfileDependencyManager::AssertFactoriesBuilt() {
   NTPResourceCacheFactory::GetInstance();
   PasswordStoreFactory::GetInstance();
   PersonalDataManagerFactory::GetInstance();
+  PluginPrefsFactory::GetInstance();
+  prerender::PrerenderManagerFactory::GetInstance();
+  ProfileSyncServiceFactory::GetInstance();
+  SigninManagerFactory::GetInstance();
+  SpellCheckFactory::GetInstance();
+  TabRestoreServiceFactory::GetInstance();
+  TemplateURLFetcherFactory::GetInstance();
+  TemplateURLServiceFactory::GetInstance();
+  TokenServiceFactory::GetInstance();
 #if !defined(OS_ANDROID)
+  CloudPrintProxyServiceFactory::GetInstance();
   PinnedTabServiceFactory::GetInstance();
 #endif
-  PluginPrefsFactory::GetInstance();
+#if defined(ENABLE_NOTIFICATIONS)
+  DesktopNotificationServiceFactory::GetInstance();
+#endif
 #if defined(ENABLE_PROTECTOR_SERVICE)
   protector::ProtectorServiceFactory::GetInstance();
 #endif
-  prerender::PrerenderManagerFactory::GetInstance();
-  ProfileSyncServiceFactory::GetInstance();
+#if defined(ENABLE_SESSION_SERVICE)
   SessionServiceFactory::GetInstance();
-  SigninManagerFactory::GetInstance();
+#endif
 #if defined(ENABLE_INPUT_SPEECH)
   SpeechInputExtensionManager::InitializeFactory();
 #endif
-  SpellCheckFactory::GetInstance();
-  TabRestoreServiceFactory::GetInstance();
 #if defined(ENABLE_THEMES)
   ThemeServiceFactory::GetInstance();
 #endif
-  TemplateURLFetcherFactory::GetInstance();
-  TemplateURLServiceFactory::GetInstance();
-  TokenServiceFactory::GetInstance();
 #if defined(ENABLE_WEB_INTENTS)
   WebIntentsRegistryFactory::GetInstance();
 #endif