[ObjC ARC] Converts ios/chrome/browser/infobars:infobars to ARC.\n\nAutomatically generated ARCMigr…

ios/chrome/browser/infobars/infobar.mm

 // 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.
 
 #include "ios/chrome/browser/infobars/infobar.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/translate/core/browser/translate_infobar_delegate.h"
 #import "ios/chrome/browser/infobars/confirm_infobar_controller.h"
 #include "ios/chrome/browser/infobars/infobar_controller.h"
 #include "ios/chrome/browser/translate/translate_infobar_tags.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using infobars::InfoBar;
 using infobars::InfoBarDelegate;
 
 InfoBarIOS::InfoBarIOS(std::unique_ptr<InfoBarDelegate> delegate)
     : InfoBar(std::move(delegate)) {}
 
 InfoBarIOS::~InfoBarIOS() {
   DCHECK(controller_);
   [controller_ detachView];
   controller_.reset();
 }
 
 void InfoBarIOS::SetController(InfoBarController* controller) {
-  controller_.reset([controller retain]);
+  controller_.reset(controller);
 }
 
 void InfoBarIOS::Layout(CGRect container_bounds) {
   DCHECK(controller_);
   if ([controller_ view]) {
     [[controller_ view] setFrame:container_bounds];
   } else {
     [controller_ layoutForDelegate:delegate() frame:container_bounds];
   }
   SetBarTargetHeight([controller_ barHeight]);
@@ skipping 75 matching lines @@
   }
 }
 
 void InfoBarIOS::InfoBarDidCancel() {
   // If not owned, the infobar has already been removed.
   if (!owner())
     return;
   delegate()->InfoBarDismissed();
   RemoveSelf();
 }