sync: Introduce ModelTypeRegistry and helpers

sync/engine/sync_directory_update_handler_unittest.cc

 // Copyright 2013 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/engine/sync_directory_update_handler.h"
 
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
 #include "sync/engine/syncer_proto_util.h"
@@ skipping 273 matching lines @@
 
   TestEntryFactory* entry_factory() {
     return entry_factory_.get();
   }
 
   syncable::Directory* directory() {
     return dir_maker_.directory();
   }
 
  private:
+  typedef std::map<ModelType, SyncDirectoryUpdateHandler*> UpdateHandlerMap;
+
   base::MessageLoop loop_;  // Needed to initialize the directory.
   TestDirectorySetterUpper dir_maker_;
   scoped_ptr<TestEntryFactory> entry_factory_;
 
   scoped_refptr<FakeModelWorker> ui_worker_;
   scoped_refptr<FakeModelWorker> password_worker_;
   scoped_refptr<FakeModelWorker> passive_worker_;
 
   UpdateHandlerMap update_handler_map_;
   STLValueDeleter<UpdateHandlerMap> update_handler_map_deleter_;
@@ skipping 513 matching lines @@
     syncable::Entry e1(&trans, syncable::GET_BY_HANDLE, decryptable_handle);
     syncable::Entry e2(&trans, syncable::GET_BY_HANDLE, undecryptable_handle);
     ASSERT_TRUE(e1.good());
     ASSERT_TRUE(e2.good());
     EXPECT_FALSE(e1.GetIsUnappliedUpdate());
     EXPECT_TRUE(e2.GetIsUnappliedUpdate());
   }
 }
 
 }  // namespace syncer