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

ios/chrome/browser/ui/settings/translate_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/translate_collection_view_controller.h"
 
 #import <Foundation/Foundation.h>
 #include <memory>
 
 #include "base/mac/foundation_util.h"
-#include "base/mac/scoped_nsobject.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/prefs/pref_member.h"
 #include "components/prefs/pref_service.h"
 #include "components/translate/core/browser/translate_pref_names.h"
 #include "components/translate/core/browser/translate_prefs.h"
 #include "ios/chrome/browser/application_context.h"
 #import "ios/chrome/browser/translate/chrome_ios_translate_client.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_switch_item.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"
 #import "ios/chrome/browser/ui/settings/settings_utils.h"
 #import "ios/chrome/browser/ui/settings/utils/pref_backed_boolean.h"
 #include "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_chromium_strings.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
 #import "ios/third_party/material_components_ios/src/components/Snackbar/src/MaterialSnackbar.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
 #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) {
   SectionIdentifierTranslate = kSectionIdentifierEnumZero,
   SectionIdentifierFooter,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeTranslate = kItemTypeEnumZero,
   ItemTypeResetTranslate,
   ItemTypeFooter,
 };
 
 const char kTranslateLearnMoreUrl[] =
     "https://support.google.com/chrome/answer/3214105?p=mobile_translate";
 NSString* const kTranslateSettingsCategory = @"ChromeTranslateSettings";
 
 }  // namespace
 
 @interface TranslateCollectionViewController ()<BooleanObserver> {
   // Profile preferences.
   PrefService* _prefs;  // weak
-  base::scoped_nsobject<PrefBackedBoolean> _translationEnabled;
+  PrefBackedBoolean* _translationEnabled;
   // The item related to the switch for the translation setting.
-  base::scoped_nsobject<CollectionViewSwitchItem> _translationItem;
+  CollectionViewSwitchItem* _translationItem;
 }
 
 @end
 
 @implementation TranslateCollectionViewController
 
 #pragma mark - Initialization
 
 - (instancetype)initWithPrefs:(PrefService*)prefs {
   DCHECK(prefs);
   self = [super initWithStyle:CollectionViewControllerStyleAppBar];
   if (self) {
     self.title = l10n_util::GetNSString(IDS_IOS_TRANSLATE_SETTING);
     self.collectionViewAccessibilityIdentifier =
         @"translate_settings_view_controller";
     _prefs = prefs;
-    _translationEnabled.reset([[PrefBackedBoolean alloc]
-        initWithPrefService:_prefs
-                   prefName:prefs::kEnableTranslate]);
+    _translationEnabled =
+        [[PrefBackedBoolean alloc] initWithPrefService:_prefs
+                                              prefName:prefs::kEnableTranslate];
     [_translationEnabled setObserver:self];
     [self loadModel];
   }
   return self;
 }
 
 - (void)dealloc {
   [_translationEnabled setObserver:nil];
-  [super dealloc];
 }
 
 #pragma mark - SettingsRootCollectionViewController
 
 - (void)loadModel {
   [super loadModel];
   CollectionViewModel* model = self.collectionViewModel;
 
   // Translate Section
   [model addSectionWithIdentifier:SectionIdentifierTranslate];
-  _translationItem.reset(
-      [[CollectionViewSwitchItem alloc] initWithType:ItemTypeTranslate]);
-  _translationItem.get().text =
-      l10n_util::GetNSString(IDS_IOS_TRANSLATE_SETTING);
-  _translationItem.get().on = [_translationEnabled value];
+  _translationItem =
+      [[CollectionViewSwitchItem alloc] initWithType:ItemTypeTranslate];
+  _translationItem.text = l10n_util::GetNSString(IDS_IOS_TRANSLATE_SETTING);
+  _translationItem.on = [_translationEnabled value];
   [model addItem:_translationItem
       toSectionWithIdentifier:SectionIdentifierTranslate];
 
-  CollectionViewTextItem* resetTranslate = [[[CollectionViewTextItem alloc]
-      initWithType:ItemTypeResetTranslate] autorelease];
+  CollectionViewTextItem* resetTranslate =
+      [[CollectionViewTextItem alloc] initWithType:ItemTypeResetTranslate];
   resetTranslate.text = l10n_util::GetNSString(IDS_IOS_TRANSLATE_SETTING_RESET);
   resetTranslate.accessibilityTraits |= UIAccessibilityTraitButton;
   resetTranslate.textFont = [MDCTypography body2Font];
   [model addItem:resetTranslate
       toSectionWithIdentifier:SectionIdentifierTranslate];
 
   // Footer Section
   [model addSectionWithIdentifier:SectionIdentifierFooter];
-  CollectionViewFooterItem* footer = [[[CollectionViewFooterItem alloc]
-      initWithType:ItemTypeFooter] autorelease];
+  CollectionViewFooterItem* footer =
+      [[CollectionViewFooterItem alloc] initWithType:ItemTypeFooter];
   footer.text = l10n_util::GetNSString(IDS_IOS_TRANSLATE_SETTING_DESCRIPTION);
   footer.linkURL = google_util::AppendGoogleLocaleParam(
       GURL(kTranslateLearnMoreUrl),
       GetApplicationContext()->GetApplicationLocale());
   footer.linkDelegate = self;
   [model addItem:footer toSectionWithIdentifier:SectionIdentifierFooter];
 }
 
 #pragma mark UICollectionViewDataSource
 
@@ skipping 88 matching lines @@
     case ItemTypeTranslate:
       return YES;
     default:
       return NO;
   }
 }
 
 #pragma mark - BooleanObserver
 
 - (void)booleanDidChange:(id<ObservableBoolean>)observableBoolean {
-  DCHECK_EQ(observableBoolean, _translationEnabled.get());
+  DCHECK_EQ(observableBoolean, _translationEnabled);
 
   // Update the item.
-  _translationItem.get().on = [_translationEnabled value];
+  _translationItem.on = [_translationEnabled value];
 
   // Update the cell.
   [self reconfigureCellsForItems:@[ _translationItem ]];
 }
 
 #pragma mark - Actions
 
 - (void)translateToggled:(id)sender {
   NSIndexPath* switchPath = [self.collectionViewModel
       indexPathForItemType:ItemTypeTranslate
          sectionIdentifier:SectionIdentifierTranslate];
 
   CollectionViewSwitchItem* switchItem =
       base::mac::ObjCCastStrict<CollectionViewSwitchItem>(
           [self.collectionViewModel itemAtIndexPath:switchPath]);
   CollectionViewSwitchCell* switchCell =
       base::mac::ObjCCastStrict<CollectionViewSwitchCell>(
           [self.collectionView cellForItemAtIndexPath:switchPath]);
 
   DCHECK_EQ(switchCell.switchView, sender);
   BOOL isOn = switchCell.switchView.isOn;
   switchItem.on = isOn;
   [_translationEnabled setValue:isOn];
 }
 
 @end