[Sync] Move SyncBackendRegistrar to engine/

components/sync/engine/sync_backend_registrar.h

Index: components/sync/engine/sync_backend_registrar.h
diff --git a/components/sync/driver/glue/sync_backend_registrar.h b/components/sync/engine/sync_backend_registrar.h
similarity index 97%
rename from components/sync/driver/glue/sync_backend_registrar.h
rename to components/sync/engine/sync_backend_registrar.h
index 2f8f355646d3c7875d328d64f90363ccfd3d2b54..23bbb6776d54489ffd6c58432a251f5846da992f 100644
--- a/components/sync/driver/glue/sync_backend_registrar.h
+++ b/components/sync/engine/sync_backend_registrar.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_GLUE_SYNC_BACKEND_REGISTRAR_H_
-#define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_REGISTRAR_H_
+#ifndef COMPONENTS_SYNC_ENGINE_SYNC_BACKEND_REGISTRAR_H_
+#define COMPONENTS_SYNC_ENGINE_SYNC_BACKEND_REGISTRAR_H_
 
 #include <stdint.h>
 
@@ -170,4 +170,4 @@ class SyncBackendRegistrar : public SyncManager::ChangeDelegate {
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_REGISTRAR_H_
+#endif  // COMPONENTS_SYNC_ENGINE_SYNC_BACKEND_REGISTRAR_H_