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

ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_table_view_controller.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_RECENT_TABS_TABLE_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_RECENT_TABS_TABLE_VIEW_CONTROLLER_H_
 
 #import "ios/chrome/browser/ui/ntp/new_tab_page_panel_protocol.h"
 
 #import "ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller.h"
@@ skipping 25 matching lines @@
 //   the user that they can turn on sync on other devices.
 // C/ Session section.
 //   This section shows the sessions from other devices.
 //
 // Section A is always present, followed by section A*.
 // Depending on the user sync state, either section B or section C will be
 // presented.
 @interface RecentTabsTableViewController
     : UITableViewController<UIGestureRecognizerDelegate>
 
-@property(nonatomic, assign) id<RecentTabsTableViewControllerDelegate>
-    delegate;  // weak
+@property(nonatomic, weak) id<RecentTabsTableViewControllerDelegate> delegate;
 
 // Designated initializer. The controller opens link with |loader|.
 // |browserState|
 // and |loader| must not be nil.
 - (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
                               loader:(id<UrlLoader>)loader;
 
 // Refreshes the table view to match the current sync state.
 - (void)refreshUserState:(SessionsSyncUserState)state;
 
 // Refreshes the recently closed tab section.
 - (void)refreshRecentlyClosedTabs;
 
 // Sets the service used to populate the closed tab section. Can be used to nil
 // the service in case it is not available anymore.
 - (void)setTabRestoreService:(sessions::TabRestoreService*)tabRestoreService;
 
 // Sets whether scroll to top is enabled.
 - (void)setScrollsToTop:(BOOL)enabled;
 
 // Dismisses any outstanding modal user interface elements.
 - (void)dismissModals;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_RECENT_TABS_TABLE_VIEW_CONTROLLER_H_