sync: Make ProfileSyncService a ProfileKeyedService.

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 f3c13c2c7a93fd741a0483c4d5e4b39f6d440167..7c653231ab55350c23845c312324f0bd3f4c3ce3 100644
--- a/chrome/browser/profiles/profile_dependency_manager.cc
+++ b/chrome/browser/profiles/profile_dependency_manager.cc
@@ -22,6 +22,7 @@
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/browser/sessions/tab_restore_service_factory.h"
 #include "chrome/browser/speech/speech_input_extension_manager.h"
+#include "chrome/browser/sync/profile_sync_service_factory.h"
 
 class Profile;
 
@@ -47,6 +48,7 @@ void AssertFactoriesBuilt() {
     PersonalDataManagerFactory::GetInstance();
     PluginPrefsFactory::GetInstance();
     prerender::PrerenderManagerFactory::GetInstance();
+    ProfileSyncServiceFactory::GetInstance();
     SessionServiceFactory::GetInstance();
     SpeechInputExtensionManager::InitializeFactory();
     TabRestoreServiceFactory::GetInstance();