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

ios/chrome/browser/ui/settings/sync_settings_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/sync_settings_collection_view_controller.h"
 
 #include <memory>
 
 #import "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
@@ skipping 12 matching lines @@
 #import "ios/chrome/browser/ui/collection_view/collection_view_controller_test.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
 #import "ios/chrome/browser/ui/settings/cells/sync_switch_item.h"
 #import "ios/chrome/browser/ui/settings/cells/text_and_error_item.h"
 #import "ios/chrome/browser/ui/sync/sync_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/web/public/test/test_web_thread_bundle.h"
 #import "testing/gtest_mac.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface SyncSettingsCollectionViewController (ExposedForTesting)
 - (int)titleIdForSyncableDataType:(SyncSetupService::SyncableDatatype)datatype;
 - (void)onSyncStateChanged;
 @end
 
 namespace {
 
 using testing::DefaultValue;
 using testing::NiceMock;
 using testing::Return;
@@ skipping 134 matching lines @@
                 chrome_browser_state_.get()));
     ON_CALL(*mock_profile_sync_service_, IsEngineInitialized())
         .WillByDefault(Return(true));
     ON_CALL(*mock_profile_sync_service_, GetRegisteredDataTypes())
         .WillByDefault(Return(syncer::ModelTypeSet()));
     mock_profile_sync_service_->Initialize();
     EXPECT_CALL(*mock_profile_sync_service_, GetPreferredDataTypes())
         .WillRepeatedly(Return(syncer::UserSelectableTypes()));
   }
 
-  CollectionViewController* NewController() override {
+  CollectionViewController* InstantiateController() override {
     return [[SyncSettingsCollectionViewController alloc]
           initWithBrowserState:chrome_browser_state_.get()
         allowSwitchSyncAccount:YES];
   }
 
   SyncSettingsCollectionViewController* CreateSyncController() {
     CreateController();
     CheckTitleWithId(IDS_IOS_SYNC_SETTING_TITLE);
     return static_cast<SyncSettingsCollectionViewController*>(controller());
   }
@@ skipping 152 matching lines @@
 
   TurnSyncErrorOff();
   [sync_controller onSyncStateChanged];
   encryptionItem = GetCollectionViewItem(2, 0);
   EXPECT_NSEQ(encryptionItem.text,
               l10n_util::GetNSString(IDS_IOS_SYNC_ENCRYPTION_TITLE));
   CheckErrorIcon(NO, 2, 0);
 }
 
 }  // namespace