Make SyncBackendRegistrar aware of loaded data

sync/test/engine/syncer_command_test.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 SYNC_TEST_ENGINE_SYNCER_COMMAND_TEST_H_
 #define SYNC_TEST_ENGINE_SYNCER_COMMAND_TEST_H_
 
 #include <algorithm>
 #include <string>
 #include <vector>
@@ skipping 105 matching lines @@
   }
 
   void ClearSession() {
     session_.reset();
   }
 
   void ResetContext() {
     throttled_data_type_tracker_.reset(new ThrottledDataTypeTracker(NULL));
     context_.reset(new sessions::SyncSessionContext(
             mock_server_.get(), directory(),
-            routing_info_, GetWorkers(), &extensions_activity_monitor_,
+            GetWorkers(), &extensions_activity_monitor_,
             throttled_data_type_tracker_.get(),
             std::vector<SyncEngineEventListener*>(),
             &mock_debug_info_getter_,
             &traffic_recorder_));
     context_->set_account_name(directory()->name());
     ClearSession();
   }
 
   // Install a MockServerConnection.  Resets the context.  By default,
   // the context does not have a MockServerConnection attached.
@@ skipping 90 matching lines @@
 
   virtual void SetUp() OVERRIDE;
 
   TestUnrecoverableErrorHandler handler_;
   syncable::MockDirectory mock_directory_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_TEST_ENGINE_SYNCER_COMMAND_TEST_H_