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

ios/chrome/browser/native_app_launcher/native_app_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.
 
 #include "ios/chrome/browser/native_app_launcher/native_app_infobar_delegate.h"
 
 #import <Foundation/Foundation.h>
 
 #include <memory>
 #include <utility>
 
-#include "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/infobars/core/infobar_manager.h"
 #import "ios/chrome/browser/native_app_launcher/native_app_infobar_controller.h"
 #import "ios/chrome/browser/native_app_launcher/native_app_navigation_controller_protocol.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
+
 namespace native_app_infobar {
 const CGSize kSmallIconSize = {29.0, 29.0};
 }  // namespace native_app_infobar
 
 NativeAppInfoBarDelegate::NativeAppInfoBarDelegate(
     id<NativeAppNavigationControllerProtocol> controller,
     const GURL& page_url,
     NativeAppControllerType type)
     : controller_(controller), page_url_(page_url), type_(type) {}
 
 NativeAppInfoBarDelegate::~NativeAppInfoBarDelegate() {}
 
 // static
 bool NativeAppInfoBarDelegate::Create(
     infobars::InfoBarManager* manager,
     id<NativeAppNavigationControllerProtocol> controller_protocol,
     const GURL& page_url,
     NativeAppControllerType type) {
   DCHECK(manager);
   auto infobar =
       base::MakeUnique<InfoBarIOS>(base::MakeUnique<NativeAppInfoBarDelegate>(
           controller_protocol, page_url, type));
-  base::scoped_nsobject<NativeAppInfoBarController> controller(
-      [[NativeAppInfoBarController alloc] initWithDelegate:infobar.get()]);
+  NativeAppInfoBarController* controller =
+      [[NativeAppInfoBarController alloc] initWithDelegate:infobar.get()];
   infobar->SetController(controller);
   return !!manager->AddInfoBar(std::move(infobar));
 }
 
 bool NativeAppInfoBarDelegate::ShouldExpire(
     const NavigationDetails& details) const {
   return details.is_navigation_to_different_page;
 }
 
 NativeAppInfoBarDelegate*
@@ skipping 85 matching lines @@
     case NATIVE_APP_ACTION_IGNORE:
     case NATIVE_APP_ACTION_COUNT:
       NOTREACHED();
       break;
   }
 }
 
 NativeAppControllerType NativeAppInfoBarDelegate::GetControllerType() const {
   return type_;
 }