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

ios/chrome/browser/ui/settings/sync_encryption_collection_view_controller.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/settings/sync_encryption_collection_view_controller.h"
 
-#import "base/ios/weak_nsobject.h"
-#import "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/sync/base/sync_prefs.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
 #import "ios/chrome/browser/sync/sync_observer_bridge.h"
 #import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_footer_item.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
 #import "ios/chrome/browser/ui/settings/cells/encryption_item.h"
 #import "ios/chrome/browser/ui/settings/settings_utils.h"
 #import "ios/chrome/browser/ui/settings/sync_create_passphrase_collection_view_controller.h"
 #import "ios/chrome/browser/ui/settings/sync_encryption_passphrase_collection_view_controller.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
   SectionIdentifierEncryption = kSectionIdentifierEnumZero,
   SectionIdentifierFooter,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeAccount = kItemTypeEnumZero,
   ItemTypePassphrase,
@@ skipping 68 matching lines @@
 - (CollectionViewItem*)passphraseItem {
   DCHECK(browser_sync::ProfileSyncService::IsSyncAllowedByFlag());
   NSString* text = l10n_util::GetNSString(IDS_SYNC_FULL_ENCRYPTION_DATA);
   return [self itemWithType:ItemTypePassphrase
                        text:text
                     checked:_isUsingSecondaryPassphrase
                     enabled:!_isUsingSecondaryPassphrase];
 }
 
 - (CollectionViewItem*)footerItem {
-  CollectionViewFooterItem* footerItem = [[[CollectionViewFooterItem alloc]
-      initWithType:ItemTypeFooter] autorelease];
+  CollectionViewFooterItem* footerItem =
+      [[CollectionViewFooterItem alloc] initWithType:ItemTypeFooter];
   footerItem.text =
       l10n_util::GetNSString(IDS_IOS_SYNC_ENCRYPTION_PASSPHRASE_HINT);
   footerItem.linkURL = google_util::AppendGoogleLocaleParam(
       GURL(kSyncGoogleDashboardURL),
       GetApplicationContext()->GetApplicationLocale());
   footerItem.linkDelegate = self;
   return footerItem;
 }
 
 #pragma mark - MDCCollectionViewStylingDelegate
@@ skipping 52 matching lines @@
     return;
   }
 
   switch (item.type) {
     case ItemTypePassphrase: {
       DCHECK(browser_sync::ProfileSyncService::IsSyncAllowedByFlag());
       browser_sync::ProfileSyncService* service =
           IOSChromeProfileSyncServiceFactory::GetForBrowserState(_browserState);
       if (service->IsEngineInitialized() &&
           !service->IsUsingSecondaryPassphrase()) {
-        base::scoped_nsobject<SyncCreatePassphraseCollectionViewController>
-            controller([[SyncCreatePassphraseCollectionViewController alloc]
-                initWithBrowserState:_browserState]);
+        SyncCreatePassphraseCollectionViewController* controller =
+            [[SyncCreatePassphraseCollectionViewController alloc]
+                initWithBrowserState:_browserState];
         [self.navigationController pushViewController:controller animated:YES];
       }
       break;
     }
     case ItemTypeAccount:
     case ItemTypeFooter:
     default:
       break;
   }
 }
@@ skipping 10 matching lines @@
     [self reloadData];
   }
 }
 
 #pragma mark - Private methods
 
 - (CollectionViewItem*)itemWithType:(NSInteger)type
                                text:(NSString*)text
                             checked:(BOOL)checked
                             enabled:(BOOL)enabled {
-  EncryptionItem* item =
-      [[[EncryptionItem alloc] initWithType:type] autorelease];
+  EncryptionItem* item = [[EncryptionItem alloc] initWithType:type];
   item.text = text;
   item.accessoryType = checked ? MDCCollectionViewCellAccessoryCheckmark
                                : MDCCollectionViewCellAccessoryNone;
   item.enabled = enabled;
   return item;
 }
 
 @end