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

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

Index: ios/chrome/browser/ui/settings/dataplan_usage_collection_view_controller.mm
diff --git a/ios/chrome/browser/ui/settings/dataplan_usage_collection_view_controller.mm b/ios/chrome/browser/ui/settings/dataplan_usage_collection_view_controller.mm
index b79607afefecd064d41a18ef5991642aa7c8dcc6..f46e458eb19f3fffbf73644f612febdd3f88f1e7 100644
--- a/ios/chrome/browser/ui/settings/dataplan_usage_collection_view_controller.mm
+++ b/ios/chrome/browser/ui/settings/dataplan_usage_collection_view_controller.mm
@@ -6,7 +6,6 @@
 
 #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"
@@ -16,6 +15,10 @@
 #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) {
@@ -71,20 +74,20 @@ typedef NS_ENUM(NSInteger, ItemType) {
 
   [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];