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

ios/chrome/browser/ui/ntp/incognito_panel_controller.h

 // Copyright 2012 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_INCOGNITO_PANEL_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_NTP_INCOGNITO_PANEL_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/ui/ntp/new_tab_page_panel_protocol.h"
 
 namespace ios {
 class ChromeBrowserState;
 }
 
 @protocol UrlLoader;
 @protocol WebToolbarDelegate;
 
 @interface IncognitoPanelController : NSObject<NewTabPagePanelProtocol>
 
 // The view that is displaying the incognito* panel.
-@property(nonatomic, readonly) UIView* view;
+@property(weak, nonatomic, readonly) UIView* view;
 
 // Init with the given loader object. |loader| may be nil, but isn't
 // retained so it must outlive this controller. |browserState| may not be null.
 // |webToolbarDelegate| is used to fade the toolbar views on page scroll.
 - (id)initWithLoader:(id<UrlLoader>)loader
           browserState:(ios::ChromeBrowserState*)browserState
     webToolbarDelegate:(id<WebToolbarDelegate>)webToolbarDelegate;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_NTP_INCOGNITO_PANEL_CONTROLLER_H_