[ObjC ARC] Converts ios/chrome/browser/sync/sessions:sessions to ARC.Automatically generated ARCM…

ios/chrome/browser/sync/sessions/ios_chrome_local_session_event_router.mm

 // 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.
 
 #include "ios/chrome/browser/sync/sessions/ios_chrome_local_session_event_router.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/sync_sessions/sync_sessions_client.h"
 #include "components/sync_sessions/synced_tab_delegate.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
 #include "ios/chrome/browser/sync/glue/sync_start_util.h"
 #include "ios/chrome/browser/sync/ios_chrome_synced_tab_delegate.h"
 #include "ios/chrome/browser/tab_parenting_global_observer.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 sync_sessions::SyncedTabDelegate* GetSyncedTabDelegateFromWebState(
     web::WebState* web_state) {
   sync_sessions::SyncedTabDelegate* delegate =
       IOSChromeSyncedTabDelegate::FromWebState(web_state);
   return delegate;
 }
 
 }  // namespace
@@ skipping 83 matching lines @@
 
 void IOSChromeLocalSessionEventRouter::StartRoutingTo(
     sync_sessions::LocalSessionEventHandler* handler) {
   DCHECK(!handler_);
   handler_ = handler;
 }
 
 void IOSChromeLocalSessionEventRouter::Stop() {
   handler_ = nullptr;
 }