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

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

Index: ios/chrome/browser/ui/bookmarks/bookmark_folder_view_controller.mm
diff --git a/ios/chrome/browser/ui/bookmarks/bookmark_folder_view_controller.mm b/ios/chrome/browser/ui/bookmarks/bookmark_folder_view_controller.mm
index e12d250be5d540501ce2fe629649074a121e0836..da55fb7293bae425573755d151ef387d1cc364f5 100644
--- a/ios/chrome/browser/ui/bookmarks/bookmark_folder_view_controller.mm
+++ b/ios/chrome/browser/ui/bookmarks/bookmark_folder_view_controller.mm
@@ -7,7 +7,10 @@
 #include <memory>
 #include <vector>
 
+#import "base/ios/weak_nsobject.h"
 #include "base/logging.h"
+#include "base/mac/objc_property_releaser.h"
+#include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_folder_editor_view_controller.h"
@@ -21,10 +24,6 @@
 #import "ios/third_party/material_components_ios/src/components/AppBar/src/MaterialAppBar.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
 using bookmarks::BookmarkNode;
 
 namespace {
@@ -55,7 +54,9 @@
   std::set<const BookmarkNode*> _editedNodes;
   std::vector<const BookmarkNode*> _folders;
   std::unique_ptr<bookmarks::BookmarkModelBridge> _modelBridge;
-  MDCAppBar* _appBar;
+  base::scoped_nsobject<MDCAppBar> _appBar;
+  base::mac::ObjCPropertyReleaser
+      _propertyReleaser_BookmarkFolderViewController;
 }
 
 // Should the controller setup Cancel and Done buttons instead of a back button.
@@ -71,7 +72,7 @@
 @property(nonatomic, readonly) const BookmarkNode* selectedFolder;
 
 // The view controller to present when creating a new folder.
-@property(nonatomic, strong)
+@property(nonatomic, retain)
     BookmarkFolderEditorViewController* folderAddController;
 
 // A linear list of folders.
@@ -79,7 +80,7 @@
     const std::vector<const BookmarkNode*>& folders;
 
 // The table view that displays the options and folders.
-@property(nonatomic, strong) UITableView* tableView;
+@property(nonatomic, retain) UITableView* tableView;
 
 // Returns the cell for the default section and the given |row|.
 - (BookmarkFolderTableViewCell*)defaultSectionCellForRow:(NSInteger)row;
@@ -125,6 +126,8 @@
   DCHECK(selectedFolder == NULL || selectedFolder->is_folder());
   self = [super initWithNibName:nil bundle:nil];
   if (self) {
+    _propertyReleaser_BookmarkFolderViewController.Init(
+        self, [BookmarkFolderViewController class]);
     _allowsCancel = allowsCancel;
     _allowsNewFolders = allowsNewFolders;
     _bookmarkModel = bookmarkModel;
@@ -135,7 +138,7 @@
     _modelBridge.reset(
         new bookmarks::BookmarkModelBridge(self, _bookmarkModel));
 
-    _appBar = [[MDCAppBar alloc] init];
+    _appBar.reset([[MDCAppBar alloc] init]);
     [self addChildViewController:[_appBar headerViewController]];
   }
   return self;
@@ -152,6 +155,7 @@
   _tableView.dataSource = nil;
   _tableView.delegate = nil;
   _folderAddController.delegate = nil;
+  [super dealloc];
 }
 
 - (UIStatusBarStyle)preferredStatusBarStyle {
@@ -170,13 +174,13 @@
 
   self.title = l10n_util::GetNSString(IDS_IOS_BOOKMARK_CHOOSE_GROUP_BUTTON);
 
-  UIBarButtonItem* doneItem = [[UIBarButtonItem alloc]
+  base::scoped_nsobject<UIBarButtonItem> doneItem([[UIBarButtonItem alloc]
       initWithTitle:l10n_util::GetNSString(
                         IDS_IOS_BOOKMARK_EDIT_MODE_EXIT_MOBILE)
               style:UIBarButtonItemStylePlain
              target:self
-             action:@selector(done:)];
-  doneItem.accessibilityIdentifier = @"Done";
+             action:@selector(done:)]);
+  doneItem.get().accessibilityIdentifier = @"Done";
   self.navigationItem.rightBarButtonItem = doneItem;
 
   if (self.allowsCancel) {
@@ -200,14 +204,14 @@
   }
 
   // The table view.
-  UITableView* tableView =
-      [[UITableView alloc] initWithFrame:self.view.bounds
-                                   style:UITableViewStylePlain];
-  tableView.dataSource = self;
-  tableView.delegate = self;
-  tableView.autoresizingMask =
+  base::scoped_nsobject<UITableView> tableView([[UITableView alloc]
+      initWithFrame:self.view.bounds
+              style:UITableViewStylePlain]);
+  tableView.get().dataSource = self;
+  tableView.get().delegate = self;
+  tableView.get().autoresizingMask =
       UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
-  tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+  tableView.get().separatorStyle = UITableViewCellSeparatorStyleNone;
   [self.view addSubview:tableView];
   [self.view sendSubviewToBack:tableView];
   self.tableView = tableView;
@@ -333,16 +337,18 @@
   CGRect headerViewFrame =
       CGRectMake(0, 0, CGRectGetWidth(tableView.frame),
                  [self tableView:tableView heightForHeaderInSection:section]);
-  UIView* headerView = [[UIView alloc] initWithFrame:headerViewFrame];
+  UIView* headerView =
+      [[[UIView alloc] initWithFrame:headerViewFrame] autorelease];
   if (section == BookmarkFolderSectionFolders &&
       [self shouldShowDefaultSection]) {
     CGRect separatorFrame =
         CGRectMake(0, 0, CGRectGetWidth(headerView.bounds),
                    1.0 / [[UIScreen mainScreen] scale]);  // 1-pixel divider.
-    UIView* separator = [[UIView alloc] initWithFrame:separatorFrame];
-    separator.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin |
-                                 UIViewAutoresizingFlexibleWidth;
-    separator.backgroundColor = bookmark_utils_ios::separatorColor();
+    base::scoped_nsobject<UIView> separator(
+        [[UIView alloc] initWithFrame:separatorFrame]);
+    separator.get().autoresizingMask = UIViewAutoresizingFlexibleBottomMargin |
+                                       UIViewAutoresizingFlexibleWidth;
+    separator.get().backgroundColor = bookmark_utils_ios::separatorColor();
     [headerView addSubview:separator];
   }
   return headerView;
@@ -363,7 +369,7 @@
 
 - (UIView*)tableView:(UITableView*)tableView
     viewForFooterInSection:(NSInteger)section {
-  return [[UIView alloc] init];
+  return [[[UIView alloc] init] autorelease];
 }
 
 - (void)tableView:(UITableView*)tableView
@@ -532,15 +538,16 @@
 
 - (void)delayedNotifyDelegateOfSelection {
   self.view.userInteractionEnabled = NO;
-  __weak BookmarkFolderViewController* weakSelf = self;
+  base::WeakNSObject<BookmarkFolderViewController> weakSelf(self);
   dispatch_after(
       dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)),
       dispatch_get_main_queue(), ^{
-        BookmarkFolderViewController* strongSelf = weakSelf;
+        base::scoped_nsobject<BookmarkFolderViewController> strongSelf(
+            [weakSelf retain]);
         // Early return if the controller has been deallocated.
         if (!strongSelf)
           return;
-        strongSelf.view.userInteractionEnabled = YES;
+        strongSelf.get().view.userInteractionEnabled = YES;
         [strongSelf done:nil];
       });
 }