[Sync] SyncEngine refactor part 1: interfaces.

components/sync/engine/model_type_configurer.h

Index: components/sync/engine/model_type_configurer.h
diff --git a/components/sync/driver/backend_data_type_configurer.h b/components/sync/engine/model_type_configurer.h
similarity index 87%
rename from components/sync/driver/backend_data_type_configurer.h
rename to components/sync/engine/model_type_configurer.h
index dcd6ed751190184759eb80589c535b8c449b53c6..d1f943301d022b52ce5bdc8e2c9bfc22634d3d8c 100644
--- a/components/sync/driver/backend_data_type_configurer.h
+++ b/components/sync/engine/model_type_configurer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SYNC_DRIVER_BACKEND_DATA_TYPE_CONFIGURER_H_
-#define COMPONENTS_SYNC_DRIVER_BACKEND_DATA_TYPE_CONFIGURER_H_
+#ifndef COMPONENTS_SYNC_ENGINE_MODEL_TYPE_CONFIGURER_H_
+#define COMPONENTS_SYNC_ENGINE_MODEL_TYPE_CONFIGURER_H_
 
 #include <map>
 #include <memory>
@@ -21,7 +21,7 @@ struct ActivationContext;
 // The DataTypeConfigurer interface abstracts out the action of
 // configuring a set of new data types and cleaning up after a set of
 // removed data types.
-class BackendDataTypeConfigurer {
+class ModelTypeConfigurer {
  public:
   enum DataTypeConfigState {
     CONFIGURE_ACTIVE,    // Actively being configured. Data of such types
@@ -46,11 +46,10 @@ class BackendDataTypeConfigurer {
   // Returns: the set of types that are already configured and are ready to
   // start.
   //
-  // TODO(akalin): Use a Delegate class with
-  // OnConfigureSuccess/OnConfigureFailure/OnConfigureRetry instead of
-  // a pair of callbacks.  The awkward part is handling when
-  // SyncBackendHost calls ConfigureDataTypes on itself to configure
-  // Nigori.
+  // TODO(akalin): Use a Delegate class with OnConfigureSuccess,
+  // OnConfigureFailure, and OnConfigureRetry instead of a pair of callbacks.
+  // The awkward part is handling when SyncEngine calls ConfigureDataTypes on
+  // itself to configure Nigori.
   virtual ModelTypeSet ConfigureDataTypes(
       ConfigureReason reason,
       const DataTypeConfigStateMap& config_state_map,
@@ -88,9 +87,9 @@ class BackendDataTypeConfigurer {
                                 DataTypeConfigStateMap* state_map);
 
  protected:
-  virtual ~BackendDataTypeConfigurer() {}
+  virtual ~ModelTypeConfigurer() {}
 };
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_DRIVER_BACKEND_DATA_TYPE_CONFIGURER_H_
+#endif  // COMPONENTS_SYNC_ENGINE_MODEL_TYPE_CONFIGURER_H_