[Sync] Change std::wstring to string16 in SyncSetupFlowHandler.

chrome/browser/sync/sync_setup_flow.cc

 // Copyright (c) 2011 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 "chrome/browser/sync/sync_setup_flow.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
@@ skipping 478 matching lines @@
       // display the error appropriately (http://crbug.com/92722).
       DictionaryValue args;
       SyncSetupFlow::GetArgsForGaiaLogin(service_, &args);
       args.SetBoolean("fatalError", true);
       current_state_ = SyncSetupWizard::GAIA_LOGIN;
       flow_handler_->ShowGaiaLogin(args);
       break;
     }
     case SyncSetupWizard::DONE:
     case SyncSetupWizard::ABORT:
-      flow_handler_->ShowSetupDone(
-          UTF16ToWide(service_->GetAuthenticatedUsername()));
+      flow_handler_->ShowSetupDone(service_->GetAuthenticatedUsername());
       break;
     default:
       NOTREACHED() << "Invalid advance state: " << state;
   }
 }