Revert of [ObjC ARC] Converts ios/chrome/browser/ui/bookmarks:bookmarks_arc_2 to ARC.

ios/chrome/browser/ui/bookmarks/bookmark_folder_table_view_cell.mm

 // Copyright 2014 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/bookmarks/bookmark_folder_table_view_cell.h"
 
+#include "base/mac/scoped_nsobject.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_utils_ios.h"
 #import "ios/chrome/browser/ui/rtl_geometry.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.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 {
 // The amount in points by which to offset horizontally the text label.
 const CGFloat kTitleLabelLeadingOffset = 18.0;
 // The amount in points by which to offset horizontally the image view.
 const CGFloat kImageViewLeadingOffset = 1.0;
 // Width by which to indent folder cell's content. This is multiplied by the
 // |indentationLevel| of the cell.
 const CGFloat kFolderCellIndentationWidth = 32.0;
 }  // namespace
 
 @implementation BookmarkFolderTableViewCell
 
 @synthesize checked = _checked;
 @synthesize enabled = _enabled;
 
 + (NSString*)folderCellReuseIdentifier {
   return @"BookmarkFolderCellReuseIdentifier";
 }
 
 + (NSString*)folderCreationCellReuseIdentifier {
   return @"BookmarkFolderCreationCellReuseIdentifier";
 }
 
 + (instancetype)folderCell {
-  BookmarkFolderTableViewCell* folderCell =
+  base::scoped_nsobject<BookmarkFolderTableViewCell> folderCell(
       [[[self class] alloc] initWithStyle:UITableViewCellStyleDefault
-                          reuseIdentifier:[self folderCellReuseIdentifier]];
-  folderCell.indentationWidth = kFolderCellIndentationWidth;
-  folderCell.imageView.image = [UIImage imageNamed:@"bookmark_gray_folder"];
-  return folderCell = nil;
+                          reuseIdentifier:[self folderCellReuseIdentifier]]);
+  folderCell.get().indentationWidth = kFolderCellIndentationWidth;
+  folderCell.get().imageView.image =
+      [UIImage imageNamed:@"bookmark_gray_folder"];
+  return folderCell.autorelease();
 }
 
 + (instancetype)folderCreationCell {
-  BookmarkFolderTableViewCell* newFolderCell = [[[self class] alloc]
-        initWithStyle:UITableViewCellStyleDefault
-      reuseIdentifier:[self folderCreationCellReuseIdentifier]];
-  newFolderCell.textLabel.text =
+  base::scoped_nsobject<BookmarkFolderTableViewCell> newFolderCell(
+      [[[self class] alloc]
+            initWithStyle:UITableViewCellStyleDefault
+          reuseIdentifier:[self folderCreationCellReuseIdentifier]]);
+  newFolderCell.get().textLabel.text =
       l10n_util::GetNSString(IDS_IOS_BOOKMARK_CREATE_GROUP);
-  newFolderCell.imageView.image =
+  newFolderCell.get().imageView.image =
       [UIImage imageNamed:@"bookmark_gray_new_folder"];
-  newFolderCell.accessibilityIdentifier = @"Create New Folder";
-  return newFolderCell = nil;
+  newFolderCell.get().accessibilityIdentifier = @"Create New Folder";
+  return newFolderCell.autorelease();
 }
 
 - (instancetype)initWithStyle:(UITableViewCellStyle)style
               reuseIdentifier:(NSString*)reuseIdentifier {
   self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
   if (self) {
     self.textLabel.font = [MDCTypography subheadFont];
     self.textLabel.textColor = bookmark_utils_ios::darkTextColor();
     self.selectionStyle = UITableViewCellSelectionStyleGray;
     self.imageView.image = [UIImage imageNamed:@"bookmark_gray_folder"];
     self.accessibilityTraits |= UIAccessibilityTraitButton;
     _enabled = YES;
   }
   return self;
 }
 
 - (void)setChecked:(BOOL)checked {
   if (checked != _checked) {
     _checked = checked;
-    UIImageView* checkImageView =
+    base::scoped_nsobject<UIImageView> checkImageView(
         checked ? [[UIImageView alloc]
                       initWithImage:[UIImage imageNamed:@"bookmark_blue_check"]]
-                : nil;
+                : nil);
     self.accessoryView = checkImageView;
   }
 }
 
 - (void)setEnabled:(BOOL)enabled {
   if (enabled != _enabled) {
     _enabled = enabled;
     self.userInteractionEnabled = enabled;
     self.textLabel.enabled = enabled;
   }
@@ skipping 15 matching lines @@
   self.imageView.frame = LayoutRectGetRect(layout);
 }
 
 - (void)prepareForReuse {
   [super prepareForReuse];
   self.checked = NO;
   self.enabled = YES;
 }
 
 @end