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

ios/chrome/browser/ui/settings/translate_collection_view_controller_unittest.mm

 // Copyright 2015 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/settings/translate_collection_view_controller.h"
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/pref_member.h"
 #include "components/prefs/pref_service.h"
 #include "components/strings/grit/components_locale_settings.h"
 #include "components/sync_preferences/pref_service_mock_factory.h"
 #include "components/translate/core/browser/translate_prefs.h"
 #include "components/translate/core/common/translate_pref_names.h"
 #include "ios/chrome/browser/pref_names.h"
 #import "ios/chrome/browser/translate/chrome_ios_translate_client.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_controller_test.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using user_prefs::PrefRegistrySyncable;
 
 namespace {
 
 const char kBlacklistedSite[] = "http://blacklistedsite.com";
 const char kLanguage1[] = "klingon";
 const char kLanguage2[] = "pirate";
 
 class TranslateCollectionViewControllerTest
     : public CollectionViewControllerTest {
  protected:
   void SetUp() override {
     CollectionViewControllerTest::SetUp();
     pref_service_ = CreateLocalState();
   }
 
-  CollectionViewController* NewController() override NS_RETURNS_RETAINED {
+  CollectionViewController* InstantiateController() override {
     return [[TranslateCollectionViewController alloc]
         initWithPrefs:pref_service_.get()];
   }
 
   std::unique_ptr<PrefService> CreateLocalState() {
     scoped_refptr<PrefRegistrySyncable> registry = new PrefRegistrySyncable();
     registry->RegisterBooleanPref(prefs::kEnableTranslate, false,
                                   PrefRegistrySyncable::SYNCABLE_PREF);
     translate::TranslatePrefs::RegisterProfilePrefs(registry.get());
     registry->RegisterStringPref(
@@ skipping 48 matching lines @@
   [controller collectionView:[controller collectionView]
       didSelectItemAtIndexPath:[NSIndexPath indexPathForItem:1 inSection:0]];
   // Check that preferences are gone.
   EXPECT_FALSE(translate_prefs->IsSiteBlacklisted(kBlacklistedSite));
   EXPECT_FALSE(translate_prefs->IsBlockedLanguage(kLanguage1));
   EXPECT_FALSE(
       translate_prefs->IsLanguagePairWhitelisted(kLanguage1, kLanguage2));
 }
 
 }  // namespace