[ObjC ARC] Converts ios/chrome/browser/ui/authentication:authentication to ARC.

ios/chrome/browser/ui/authentication/re_signin_infobar_delegate.mm

 // 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.
 
 #import "ios/chrome/browser/ui/authentication/re_signin_infobar_delegate.h"
 
 #import <UIKit/UIKit.h>
 
 #include <memory>
 #include <utility>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/user_metrics.h"
 #include "components/infobars/core/infobar_manager.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/infobars/infobar.h"
 #include "ios/chrome/browser/signin/authentication_service.h"
 #include "ios/chrome/browser/signin/authentication_service_factory.h"
 #include "ios/chrome/browser/tabs/tab.h"
 #import "ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h"
 #import "ios/chrome/browser/ui/commands/show_signin_command.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 // static
 bool ReSignInInfoBarDelegate::Create(ios::ChromeBrowserState* browser_state,
                                      Tab* tab) {
   infobars::InfoBarManager* infobar_manager = [tab infoBarManager];
   DCHECK(infobar_manager);
 
   std::unique_ptr<infobars::InfoBar> infobar =
       ReSignInInfoBarDelegate::CreateInfoBar(infobar_manager, browser_state);
   if (!infobar)
     return false;
@@ skipping 68 matching lines @@
 
 gfx::Image ReSignInInfoBarDelegate::GetIcon() const {
   return icon_;
 }
 
 bool ReSignInInfoBarDelegate::Accept() {
   base::RecordAction(
       base::UserMetricsAction("Signin_Signin_FromReSigninInfobar"));
   UIView* infobarView = static_cast<InfoBarIOS*>(infobar())->view();
   DCHECK(infobarView);
-  base::scoped_nsobject<ShowSigninCommand> command([[ShowSigninCommand alloc]
+  ShowSigninCommand* command = [[ShowSigninCommand alloc]
       initWithOperation:AUTHENTICATION_OPERATION_REAUTHENTICATE
             accessPoint:signin_metrics::AccessPoint::
-                            ACCESS_POINT_RESIGNIN_INFOBAR]);
+                            ACCESS_POINT_RESIGNIN_INFOBAR];
   [infobarView chromeExecuteCommand:command];
 
   // Stop displaying the infobar once user interacted with it.
   AuthenticationServiceFactory::GetForBrowserState(browser_state_)
       ->SetPromptForSignIn(false);
   return true;
 }
 
 void ReSignInInfoBarDelegate::InfoBarDismissed() {
   // Stop displaying the infobar once user interacted with it.
   AuthenticationServiceFactory::GetForBrowserState(browser_state_)
       ->SetPromptForSignIn(false);
 }