sync: Process 'control' data separately

sync/syncable/model_type.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sync/internal_api/public/syncable/model_type.h"
 
 #include "base/string_split.h"
 #include "base/values.h"
 #include "sync/engine/syncproto.h"
 #include "sync/protocol/app_notification_specifics.pb.h"
@@ skipping 210 matching lines @@
   if (specifics.has_app_notification())
     return APP_NOTIFICATIONS;
 
   return UNSPECIFIED;
 }
 
 bool ShouldMaintainPosition(ModelType model_type) {
   return model_type == BOOKMARKS;
 }
 
+bool IsInternalType(ModelType model_type) {
+  return model_type == NIGORI;
+}
+
 const char* ModelTypeToString(ModelType model_type) {
   // This is used in serialization routines as well as for displaying debug
   // information.  Do not attempt to change these string values unless you know
   // what you're doing.
   switch (model_type) {
     case TOP_LEVEL_FOLDER:
       return "Top Level Folder";
     case UNSPECIFIED:
       return "Unspecified";
     case BOOKMARKS:
@@ skipping 292 matching lines @@
     *model_type = UNSPECIFIED;
     return false;
   }
 }
 
 bool IsRealDataType(ModelType model_type) {
   return model_type >= FIRST_REAL_MODEL_TYPE && model_type < MODEL_TYPE_COUNT;
 }
 
 }  // namespace syncable