sync: Remove WITH_NIGORI and WITHOUT_NIGORI flags

chrome/browser/sync/glue/backend_data_type_configurer.h

Index: chrome/browser/sync/glue/backend_data_type_configurer.h
diff --git a/chrome/browser/sync/glue/backend_data_type_configurer.h b/chrome/browser/sync/glue/backend_data_type_configurer.h
index 1a2d3f1f5bf8b48b0a2aed1fb901291002dccc6f..894f820cb5987e1728d2a9630d7e27fa5e5e7b00 100644
--- a/chrome/browser/sync/glue/backend_data_type_configurer.h
+++ b/chrome/browser/sync/glue/backend_data_type_configurer.h
@@ -16,10 +16,6 @@ namespace browser_sync {
 // removed data types.
 class BackendDataTypeConfigurer {
  public:
-  // Enum representing the two "modes" of configuration.
-  // WITHOUT_NIGORI is only used by migration.
-  enum NigoriState { WITHOUT_NIGORI, WITH_NIGORI };
-
   // Configures the given set of types to add and remove.
   // |ready_task| is called on the same thread as ConfigureDataTypes
   // is called when configuration is done with the set of data types
@@ -35,7 +31,6 @@ class BackendDataTypeConfigurer {
       syncer::ConfigureReason reason,
       syncer::ModelTypeSet types_to_add,
       syncer::ModelTypeSet types_to_remove,
-      NigoriState nigori_state,
       const base::Callback<void(syncer::ModelTypeSet)>& ready_task,
       const base::Callback<void()>& retry_callback) = 0;