Fix a memory leak in ios bookmarks.

ios/chrome/browser/ui/bookmarks/bookmark_edit_view_controller.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_edit_view_controller.h"
 
 #include <memory>
 #include <set>
 
 #include "base/auto_reset.h"
@@ skipping 339 matching lines @@
 
   self.nameItem =
       [[[BookmarkTextFieldItem alloc] initWithType:ItemTypeName] autorelease];
   self.nameItem.accessibilityIdentifier = @"Title Field";
   self.nameItem.placeholder =
       l10n_util::GetNSString(IDS_IOS_BOOKMARK_NAME_FIELD_HEADER);
   self.nameItem.text = bookmark_utils_ios::TitleForBookmarkNode(self.bookmark);
   self.nameItem.delegate = self;
   [model addItem:self.nameItem toSectionWithIdentifier:SectionIdentifierInfo];
 
-  self.folderItem =
-      [[BookmarkParentFolderItem alloc] initWithType:ItemTypeFolder];
+  self.folderItem = [[[BookmarkParentFolderItem alloc]
+      initWithType:ItemTypeFolder] autorelease];
   self.folderItem.title = bookmark_utils_ios::TitleForBookmarkNode(self.folder);
   [model addItem:self.folderItem toSectionWithIdentifier:SectionIdentifierInfo];
 
   self.URLItem =
       [[[BookmarkTextFieldItem alloc] initWithType:ItemTypeURL] autorelease];
   self.URLItem.accessibilityIdentifier = @"URL Field";
   self.URLItem.placeholder =
       l10n_util::GetNSString(IDS_IOS_BOOKMARK_URL_FIELD_HEADER);
   self.URLItem.text = base::SysUTF8ToNSString(self.bookmark->url().spec());
   self.URLItem.delegate = self;
@@ skipping 214 matching lines @@
   base::WeakNSObject<BookmarkEditViewController> weakSelf(self);
   return @[ [UIKeyCommand cr_keyCommandWithInput:UIKeyInputEscape
                                    modifierFlags:Cr_UIKeyModifierNone
                                            title:nil
                                           action:^{
                                             [weakSelf dismiss];
                                           }] ];
 }
 
 @end