[ObjC ARC] Converts ios/public/provider/chrome/browser/signin:signin to ARC.

ios/public/provider/chrome/browser/signin/chrome_identity_interaction_manager.mm

 // Copyright 2016 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/public/provider/chrome/browser/signin/chrome_identity_interaction_manager.h"
 
-#import "base/ios/weak_nsobject.h"
 #include "base/logging.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface ChromeIdentityInteractionManager () {
-  base::WeakNSProtocol<id<ChromeIdentityInteractionManagerDelegate>> _delegate;
+  __weak id<ChromeIdentityInteractionManagerDelegate> _delegate;

[msarda, 2017/07/03 16:14:43]

Remove this and use a synthesized weak property.

[stkhapugin, 2017/07/11 13:14:42]

Done.

 }
 @end
 
 @implementation ChromeIdentityInteractionManager
 
 - (id<ChromeIdentityInteractionManagerDelegate>)delegate {

[msarda, 2017/07/03 16:14:43]

Remove this method.

[stkhapugin, 2017/07/11 13:14:42]

Done.

   return _delegate;
 }
 
 - (void)setDelegate:(id<ChromeIdentityInteractionManagerDelegate>)delegate {

[msarda, 2017/07/03 16:14:42]

Remove this set now that the delegate is a regular weak property.

[stkhapugin, 2017/07/11 13:14:42]

Done.

-  _delegate.reset(delegate);
+  _delegate = delegate;
 }
 
 - (BOOL)isCanceling {
   return NO;
 }
 
 - (void)addAccountWithCompletion:(SigninCompletionCallback)completion {
   NOTREACHED() << "Subclasses must override this";
   completion(nil, nil);
 }
 
 - (void)reauthenticateUserWithID:(NSString*)userID
                            email:(NSString*)userEmail
                       completion:(SigninCompletionCallback)completion {
   NOTREACHED() << "Subclasses must override this";
   completion(nil, nil);
 }
 
 - (void)cancelAndDismissAnimated:(BOOL)animated {
   NOTREACHED() << "Subclasses must override this";
 }
 
 @end