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

ios/chrome/browser/ui/settings/dataplan_usage_collection_view_controller.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/dataplan_usage_collection_view_controller.h"
 
 #include "base/logging.h"
 #import "base/mac/foundation_util.h"
-#import "base/mac/scoped_nsobject.h"
 #include "components/prefs/pref_member.h"
 #include "components/prefs/pref_service.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_item.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.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
+
 namespace {
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
   SectionIdentifierOptions = kSectionIdentifierEnumZero,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeOptionsAlways = kItemTypeEnumZero,
   ItemTypeOptionsOnlyOnWiFi,
   ItemTypeOptionsNever,
@@ skipping 35 matching lines @@
   NOTREACHED();
   return nil;
 }
 
 - (void)loadModel {
   [super loadModel];
   CollectionViewModel* model = self.collectionViewModel;
 
   [model addSectionWithIdentifier:SectionIdentifierOptions];
 
-  base::scoped_nsobject<CollectionViewTextItem> always(
-      [[CollectionViewTextItem alloc] initWithType:ItemTypeOptionsAlways]);
+  CollectionViewTextItem* always =
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeOptionsAlways];
   [always setText:l10n_util::GetNSString(IDS_IOS_OPTIONS_DATA_USAGE_ALWAYS)];
   [always setAccessibilityTraits:UIAccessibilityTraitButton];
   [model addItem:always toSectionWithIdentifier:SectionIdentifierOptions];
 
-  base::scoped_nsobject<CollectionViewTextItem> wifi(
-      [[CollectionViewTextItem alloc] initWithType:ItemTypeOptionsOnlyOnWiFi]);
+  CollectionViewTextItem* wifi =
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeOptionsOnlyOnWiFi];
   [wifi setText:l10n_util::GetNSString(IDS_IOS_OPTIONS_DATA_USAGE_ONLY_WIFI)];
   [wifi setAccessibilityTraits:UIAccessibilityTraitButton];
   [model addItem:wifi toSectionWithIdentifier:SectionIdentifierOptions];
 
-  base::scoped_nsobject<CollectionViewTextItem> never(
-      [[CollectionViewTextItem alloc] initWithType:ItemTypeOptionsNever]);
+  CollectionViewTextItem* never =
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeOptionsNever];
   [never setText:l10n_util::GetNSString(IDS_IOS_OPTIONS_DATA_USAGE_NEVER)];
   [never setAccessibilityTraits:UIAccessibilityTraitButton];
   [model addItem:never toSectionWithIdentifier:SectionIdentifierOptions];
 
   [self updateCheckedState];
 }
 
 - (void)updateCheckedState {
   BOOL basePrefOn = basePreference_.GetValue();
   BOOL wifiPrefOn = wifiPreference_.GetValue();
@@ skipping 60 matching lines @@
     case ItemTypeOptionsOnlyOnWiFi:
       [self updateBasePref:YES wifiPref:YES];
       break;
     case ItemTypeOptionsNever:
       [self updateBasePref:NO wifiPref:NO];
       break;
   }
 }
 
 @end