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

ios/chrome/browser/infobars/infobar_manager_impl.mm

 // 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.
 
 #include "ios/chrome/browser/infobars/infobar_manager_impl.h"
 
 #include <utility>
 
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_delegate.h"
 #include "ios/chrome/browser/infobars/infobar_utils.h"
 #include "ios/web/public/load_committed_details.h"
 #include "ios/web/public/navigation_item.h"
 #include "ios/web/public/navigation_manager.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "ui/base/page_transition_types.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 DEFINE_WEB_STATE_USER_DATA_KEY(InfoBarManagerImpl);
 
 namespace {
 
 infobars::InfoBarDelegate::NavigationDetails
 NavigationDetailsFromLoadCommittedDetails(
     const web::LoadCommittedDetails& load_details) {
   infobars::InfoBarDelegate::NavigationDetails navigation_details;
   navigation_details.entry_id = load_details.item->GetUniqueID();
   const ui::PageTransition transition = load_details.item->GetTransitionType();
@@ skipping 49 matching lines @@
   // or use it otherwise during the destruction.
   web_state()->RemoveUserData(UserDataKey());
   // That was the equivalent of "delete this". This object is now destroyed;
   // returning from this function is the only safe thing to do.
 }
 
 void InfoBarManagerImpl::OpenURL(const GURL& url,
                                  WindowOpenDisposition disposition) {
   NOTIMPLEMENTED();
 }