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

ios/chrome/browser/translate/chrome_ios_translate_client.mm

 // Copyright 2014 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/translate/chrome_ios_translate_client.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 19 matching lines @@
 #import "ios/chrome/browser/translate/never_translate_infobar_controller.h"
 #include "ios/chrome/browser/translate/translate_accept_languages_factory.h"
 #import "ios/chrome/browser/translate/translate_message_infobar_controller.h"
 #include "ios/chrome/browser/translate/translate_ranker_factory.h"
 #include "ios/chrome/browser/translate/translate_service_ios.h"
 #include "ios/chrome/grit/ios_theme_resources.h"
 #include "ios/web/public/browser_state.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 DEFINE_WEB_STATE_USER_DATA_KEY(ChromeIOSTranslateClient);
 
 ChromeIOSTranslateClient::ChromeIOSTranslateClient(web::WebState* web_state)
     : web::WebStateObserver(web_state),
       translate_manager_(base::MakeUnique<translate::TranslateManager>(
           this,
           translate::TranslateRankerFactory::GetForBrowserState(
               ios::ChromeBrowserState::FromBrowserState(
                   web_state->GetBrowserState())),
           prefs::kAcceptLanguages)),
@@ skipping 18 matching lines @@
   return translate_manager_.get();
 }
 
 // TranslateClient implementation:
 
 std::unique_ptr<infobars::InfoBar> ChromeIOSTranslateClient::CreateInfoBar(
     std::unique_ptr<translate::TranslateInfoBarDelegate> delegate) const {
   translate::TranslateStep step = delegate->translate_step();
 
   std::unique_ptr<InfoBarIOS> infobar(new InfoBarIOS(std::move(delegate)));
-  base::scoped_nsobject<InfoBarController> controller;
+  InfoBarController* controller;
   switch (step) {
     case translate::TRANSLATE_STEP_AFTER_TRANSLATE:
-      controller.reset([[AfterTranslateInfoBarController alloc]
-          initWithDelegate:infobar.get()]);
+      controller = [[AfterTranslateInfoBarController alloc]
+          initWithDelegate:infobar.get()];
       break;
     case translate::TRANSLATE_STEP_BEFORE_TRANSLATE:
-      controller.reset([[BeforeTranslateInfoBarController alloc]
-          initWithDelegate:infobar.get()]);
+      controller = [[BeforeTranslateInfoBarController alloc]
+          initWithDelegate:infobar.get()];
       break;
     case translate::TRANSLATE_STEP_NEVER_TRANSLATE:
-      controller.reset([[NeverTranslateInfoBarController alloc]
-          initWithDelegate:infobar.get()]);
+      controller = [[NeverTranslateInfoBarController alloc]
+          initWithDelegate:infobar.get()];
       break;
     case translate::TRANSLATE_STEP_TRANSLATING:
     case translate::TRANSLATE_STEP_TRANSLATE_ERROR:
-      controller.reset([[TranslateMessageInfoBarController alloc]
-          initWithDelegate:infobar.get()]);
+      controller = [[TranslateMessageInfoBarController alloc]
+          initWithDelegate:infobar.get()];
       break;
     default:
       NOTREACHED();
   }
   infobar->SetController(controller);
   // TODO(crbug.com/703565): remove std::move() once Xcode 9.0+ is required.
   return std::move(infobar);
 }
 
 void ChromeIOSTranslateClient::RecordTranslateEvent(
@@ skipping 64 matching lines @@
     const GURL& report_url) {
   NOTREACHED();
 }
 
 void ChromeIOSTranslateClient::WebStateDestroyed() {
   // Translation process can be interrupted.
   // Destroying the TranslateManager now guarantees that it never has to deal
   // with nullptr WebState.
   translate_manager_.reset();
 }