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

ios/chrome/browser/ui/settings/settings_collection_view_controller.h

 // Copyright 2015 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_SETTINGS_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_SETTINGS_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
 
 #import "ios/chrome/browser/ui/settings/settings_navigation_controller.h"
 #import "ios/chrome/browser/ui/settings/settings_root_collection_view_controller.h"
 
@@ skipping 16 matching lines @@
 
 // The accessibility identifier of the Voice Search cell.
 extern NSString* const kSettingsVoiceSearchCellId;
 
 // This class is the collection view for the application settings.
 @interface SettingsCollectionViewController
     : SettingsRootCollectionViewController<SettingsControllerProtocol>
 
 // The controller used to signin on this screen. Returns nil unless a signin is
 // currently occuring.
-@property(nonatomic, readonly)
+@property(weak, nonatomic, readonly)

[lpromero, 2017/04/13 10:02:29]

Internally, it's a strong reference. I think it was just missing initially and
the tool just made it clear.

[stkhapugin, 2017/04/13 14:48:31]

Done.

     SigninInteractionController* signinInteractionController;
 
 // Initializes a new SettingsCollectionViewController. |mainBrowserState|,
 // |currentBrowserState| and |dataSource| must not be nil.
 // If |currentBrowserState| is not off the record, then it must be equal to
 // |mainBrowserState|.
 - (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)mainBrowserState
                  currentBrowserState:
                      (ios::ChromeBrowserState*)currentBrowserState
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithStyle:(CollectionViewControllerStyle)style
     NS_UNAVAILABLE;
 
 - (instancetype)init NS_UNAVAILABLE;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_SETTINGS_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_