[ObjC ARC] Converts ios/net to ARC.

ios/net/cookies/cookie_store_ios.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/net/cookies/cookie_store_ios.h"
 
 #import <Foundation/Foundation.h>
 #include <stddef.h>
 
 #include "base/bind.h"
@@ skipping 15 matching lines @@
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "ios/net/cookies/cookie_creation_time_manager.h"
 #include "ios/net/cookies/cookie_store_ios_client.h"
 #include "ios/net/cookies/system_cookie_util.h"
 #import "net/base/mac/url_conversions.h"
 #include "net/cookies/cookie_util.h"
 #include "net/cookies/parsed_cookie.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace net {
 
 namespace {
 
 #if !defined(NDEBUG)
 // The current cookie store. This weak pointer must not be used to do actual
 // work. Its only purpose is to check that there is only one synchronized
 // cookie store.
 CookieStoreIOS* g_current_synchronized_store = nullptr;
 #endif
@@ skipping 240 matching lines @@
 CookieStoreIOS::CookieStoreIOS(
     net::CookieMonster::PersistentCookieStore* persistent_store)
     : CookieStoreIOS(persistent_store,
                      [NSHTTPCookieStorage sharedHTTPCookieStorage]) {
 }
 
 CookieStoreIOS::CookieStoreIOS(
     net::CookieMonster::PersistentCookieStore* persistent_store,
     NSHTTPCookieStorage* system_store)
     : cookie_monster_(new net::CookieMonster(persistent_store, nullptr)),
-      system_store_([system_store retain]),
+      system_store_(system_store),
       creation_time_manager_(new CookieCreationTimeManager),
       metrics_enabled_(false),
       flush_delay_(base::TimeDelta::FromSeconds(10)),
       synchronization_state_(NOT_SYNCHRONIZED),
       cookie_cache_(new CookieCache()),
       weak_factory_(this) {
   DCHECK(system_store);
 
   NotificationTrampoline::GetInstance()->AddObserver(this);
 
@@ skipping 848 matching lines @@
                     weak_factory_.GetWeakPtr(), callback);
 }
 
 base::Closure CookieStoreIOS::WrapClosure(const base::Closure& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return base::Bind(&CookieStoreIOS::UpdateCachesAfterClosure,
                     weak_factory_.GetWeakPtr(), callback);
 }
 
 }  // namespace net