[Sync] Move thread checking into the ModelSafeWorker interface.

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 <memory>
 
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/threading/thread.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 "components/sync/syncable/test_user_share.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
@@ skipping 63 matching lines @@
 
   ~SyncBackendRegistrarTest() override {}
 
   void SetUp() override {
     db_thread_.StartAndWaitForTesting();
     file_thread_.StartAndWaitForTesting();
     sync_thread_.StartAndWaitForTesting();
     test_user_share_.SetUp();
     sync_client_ = base::MakeUnique<RegistrarSyncClient>(
         ui_task_runner(), db_task_runner(), file_task_runner());
-    registrar_ = base::MakeUnique<SyncBackendRegistrar>(
-        "test", sync_client_.get(), ui_task_runner(), db_task_runner(),
-        file_task_runner());
+    registrar_ =
+        base::MakeUnique<SyncBackendRegistrar>("test", sync_client_.get());
   }
 
   void TearDown() override {
     registrar_->RequestWorkerStopOnUIThread();
     test_user_share_.TearDown();
     sync_thread_.task_runner()->DeleteSoon(FROM_HERE, registrar_.release());
     sync_thread_.FlushForTesting();
   }
 
   void ExpectRoutingInfo(SyncBackendRegistrar* registrar,
@@ skipping 188 matching lines @@
       registrar_->ConfigureDataTypes(types_to_add, ModelTypeSet());
   EXPECT_EQ(ModelTypeSet(BOOKMARKS), newly_added_types);
   EXPECT_EQ(types_to_add, registrar_->GetLastConfiguredTypes());
   ExpectRoutingInfo(registrar_.get(), {{AUTOFILL, GROUP_NON_BLOCKING},
                                        {BOOKMARKS, GROUP_NON_BLOCKING}});
 }
 
 }  // namespace
 
 }  // namespace syncer