[Sync] Start implementation of migration for USS.

components/sync/engine_impl/test_entry_factory.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_ENGINE_IMPL_TEST_ENTRY_FACTORY_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_TEST_ENTRY_FACTORY_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 40 matching lines @@
                           const std::string& name,
                           bool is_folder,
                           ModelType model_type,
                           int64_t* metahandle_out);
 
   // Creates a bookmark that is both unsynced an an unapplied update.  Returns
   // the metahandle of the created item.
   int64_t CreateUnappliedAndUnsyncedBookmarkItem(const std::string& name);
 
   // Creates a unique_client_tag item that has neither IS_UNSYNED or
-  // IS_UNAPPLIED_UPDATE.  The item is known to both the server and client.
-  // Returns the metahandle of the created item.
+  // IS_UNAPPLIED_UPDATE. The item is known to both the server and client.
+  // Returns the metahandle of the created item. |specifics| is optional.
   int64_t CreateSyncedItem(const std::string& name,
                            ModelType model_type,
                            bool is_folder);
+  int64_t CreateSyncedItem(const std::string& name,
+                           ModelType model_type,
+                           bool is_folder,
+                           const sync_pb::EntitySpecifics& specifics);
+
+  // Creates a root node for |model_type|.
+  int64_t CreateTypeRootNode(ModelType model_type);
 
   // Creates a root node that IS_UNAPPLIED. Similar to what one would find in
   // the database between the ProcessUpdates of an initial datatype configure
   // cycle and the ApplyUpdates step of the same sync cycle.
   int64_t CreateUnappliedRootNode(ModelType model_type);
 
   // Looks up the item referenced by |meta_handle|. If successful, overwrites
   // the server specifics with |specifics|, sets
   // IS_UNAPPLIED_UPDATES/IS_UNSYNCED appropriately, and returns true.
   // Else, return false.
@@ skipping 51 matching lines @@
  private:
   syncable::Directory* directory_;
   int64_t next_revision_;
 
   DISALLOW_COPY_AND_ASSIGN(TestEntryFactory);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_TEST_ENTRY_FACTORY_H_