[Sync] Removing duplicate includes, part 2.

components/sync/driver/glue/sync_backend_registrar_unittest.cc

 // Copyright 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 "components/sync/driver/glue/sync_backend_registrar.h"
 
 #include "base/location.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
-#include "components/sync/base/model_type.h"
 #include "components/sync/core/test/test_user_share.h"
 #include "components/sync/driver/change_processor_mock.h"
 #include "components/sync/driver/fake_sync_client.h"
 #include "components/sync/driver/glue/browser_thread_model_worker.h"
 #include "components/sync/driver/sync_api_component_factory_mock.h"
 #include "components/sync/engine/passive_model_worker.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
@@ skipping 403 matching lines @@
   db_thread_lock_.Release();
 
   // Run the main thread loop until all workers have been removed and the
   // registrar destroyed.
   run_loop_.Run();
 }
 
 }  // namespace
 
 }  // namespace syncer