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

ios/chrome/browser/autofill/form_input_accessory_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_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/autofill/form_input_accessory_view_delegate.h"
@@ skipping 65 matching lines @@
 
 // Creates and manages a custom input accessory view while the user is
 // interacting with a form. Also handles hiding and showing the default
 // accessory view elements.
 @interface FormInputAccessoryViewController
     : NSObject<CRWWebStateObserver, FormInputAccessoryViewDelegate>
 
 // The current web view proxy.
 // TODO(crbug.com/727716): This property should not be a part of the public
 // interface, it is used in tests as a backdoor.
-@property(nonatomic, readonly) id<CRWWebViewProxy> webViewProxy;
+@property(weak, nonatomic, readonly) id<CRWWebViewProxy> webViewProxy;

[stkhapugin, 2017/06/13 12:28:25]

I think it's more of a strong, as it's a getter that returns something owned by
the child that this owns. 

[marq (ping after 24h), 2017/06/13 12:36:33]

Done.

 
 // Initializes a new controller with the specified |providers| of input
 // accessory views.
 - (instancetype)initWithWebState:(web::WebState*)webState
                        providers:(NSArray*)providers;
 
 // Notifies the controller that the owning tab was shown.
 - (void)wasShown;
 
 // Notifies the controller that the owning tab was hidden.
 - (void)wasHidden;
 
 // Hides the default input accessory view and replaces it with one that shows
 // |customView| and form navigation controls.
 - (void)showCustomInputAccessoryView:(UIView*)customView;
 
 // Restores the default input accessory view, removing (if necessary) any
 // previously-added custom view.
 - (void)restoreDefaultInputAccessoryView;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_CONTROLLER_H_