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

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

Index: ios/chrome/browser/ui/settings/physical_web_collection_view_controller.mm
diff --git a/ios/chrome/browser/ui/settings/physical_web_collection_view_controller.mm b/ios/chrome/browser/ui/settings/physical_web_collection_view_controller.mm
index 9067652d30e9239156fd2dcd789c48579a9ef730..9ef7cff93d039022380576f56d9f9e3290b05316 100644
--- a/ios/chrome/browser/ui/settings/physical_web_collection_view_controller.mm
+++ b/ios/chrome/browser/ui/settings/physical_web_collection_view_controller.mm
@@ -6,9 +6,7 @@
 
 #import <CoreLocation/CoreLocation.h>
 
-#import "base/ios/weak_nsobject.h"
 #import "base/mac/foundation_util.h"
-#import "base/mac/scoped_nsobject.h"
 #include "base/metrics/user_metrics.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/physical_web/data_source/physical_web_data_source.h"
@@ -32,6 +30,10 @@
 #include "ui/base/l10n/l10n_util.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) {
@@ -163,8 +165,8 @@ typedef NS_ENUM(NSInteger, ItemType) {
   NSString* switchLabelText =
       l10n_util::GetNSString(IDS_IOS_OPTIONS_ENABLE_PHYSICAL_WEB);
 
-  CollectionViewSwitchItem* switchItem = [[[CollectionViewSwitchItem alloc]
-      initWithType:ItemTypePhysicalWebSwitch] autorelease];
+  CollectionViewSwitchItem* switchItem =
+      [[CollectionViewSwitchItem alloc] initWithType:ItemTypePhysicalWebSwitch];
   switchItem.text = switchLabelText;
   switchItem.on = [PhysicalWebCollectionViewController
       shouldEnableForPreferenceState:_physicalWebEnabled.GetValue()];
@@ -176,8 +178,8 @@ typedef NS_ENUM(NSInteger, ItemType) {
   NSString* learnMoreText =
       l10n_util::GetNSString(IDS_IOS_OPTIONS_ENABLE_PHYSICAL_WEB_DETAILS);
 
-  CollectionViewFooterItem* learnMore = [[[CollectionViewFooterItem alloc]
-      initWithType:ItemTypeLearnMore] autorelease];
+  CollectionViewFooterItem* learnMore =
+      [[CollectionViewFooterItem alloc] initWithType:ItemTypeLearnMore];
   learnMore.text = learnMoreText;
   learnMore.linkURL = GURL(kPhysicalWebLearnMoreURL);
   learnMore.linkDelegate = self;