Make SyncBackendRegistrar aware of loaded data

chrome/browser/sync/profile_sync_service_password_unittest.cc

Index: chrome/browser/sync/profile_sync_service_password_unittest.cc
diff --git a/chrome/browser/sync/profile_sync_service_password_unittest.cc b/chrome/browser/sync/profile_sync_service_password_unittest.cc
index 5597cdb415c0eaab0cdb66706a3577e192eccfe3..715c588f4f38cd925facc95c7340a34fe0b828c7 100644
--- a/chrome/browser/sync/profile_sync_service_password_unittest.cc
+++ b/chrome/browser/sync/profile_sync_service_password_unittest.cc
@@ -87,14 +87,14 @@ class PasswordTestProfileSyncService : public TestProfileSyncService {
       Profile* profile,
       SigninManager* signin,
       bool synchronous_backend_initialization,
-      const base::Closure& initial_condition_setup_cb,
+      const base::Callback<void(syncer::UserShare*)>& initial_setup_cb,
       const base::Closure& passphrase_accept_cb)
       : TestProfileSyncService(factory,
                                profile,
                                signin,
                                ProfileSyncService::AUTO_START,
                                synchronous_backend_initialization,
-                               initial_condition_setup_cb),
+                               initial_setup_cb),
         callback_(passphrase_accept_cb) {}
 
   virtual ~PasswordTestProfileSyncService() {}
@@ -167,8 +167,9 @@ class ProfileSyncServicePasswordTest : public AbstractProfileSyncServiceTest {
     done.TimedWait(TestTimeouts::action_timeout());
   }
 
-  void StartSyncService(const base::Closure& root_callback,
-                        const base::Closure& node_callback) {
+  void StartSyncService(
+      const base::Callback<void(syncer::UserShare*)>& root_callback,
+      const base::Closure& node_callback) {
     if (!service_.get()) {
       SigninManager* signin = SigninManagerFactory::GetForProfile(&profile_);
       signin->SetAuthenticatedUsername("test_user");
@@ -277,7 +278,8 @@ void AddPasswordEntriesCallback(ProfileSyncServicePasswordTest* test,
 }
 
 TEST_F(ProfileSyncServicePasswordTest, FailModelAssociation) {
-  StartSyncService(base::Closure(), base::Closure());
+  StartSyncService(TestProfileSyncService::NullCallback(),
+                   base::Closure());
   EXPECT_TRUE(service_->HasUnrecoverableError());
 }