Properly handle initialization failure and following manager shutdown without

sync/internal_api/sync_backup_manager.cc

Index: sync/internal_api/sync_backup_manager.cc
diff --git a/sync/internal_api/sync_backup_manager.cc b/sync/internal_api/sync_backup_manager.cc
index d421dfd9f1cb39a0685defa07fc346cb65d448ac..91927e717edd121c6dbe47dec1d0d99e0746c389 100644
--- a/sync/internal_api/sync_backup_manager.cc
+++ b/sync/internal_api/sync_backup_manager.cc
@@ -50,17 +50,22 @@ void SyncBackupManager::Init(
                                 report_unrecoverable_error_function,
                                 cancelation_signal);
 
+  if (!initialized())
+    return;
+
   GetUserShare()->directory->CollectMetaHandleCounts(
-      &status_.num_entries_by_type,
-      &status_.num_to_delete_entries_by_type);
+    &status_.num_entries_by_type,
+    &status_.num_to_delete_entries_by_type);
 
   HideSyncPreference(PRIORITY_PREFERENCES);
   HideSyncPreference(PREFERENCES);
 }
 
 void SyncBackupManager::SaveChanges() {
-  NormalizeEntries();
-  GetUserShare()->directory->SaveChanges();
+  if (initialized()) {
+    NormalizeEntries();
+    GetUserShare()->directory->SaveChanges();
+  }
 }
 
 SyncStatus SyncBackupManager::GetDetailedStatus() const {