net: make CanonicalCookie's constructor private

ios/net/cookies/system_cookie_util.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/net/cookies/system_cookie_util.h"
 
 #import <Foundation/Foundation.h>
 #include <stddef.h>
 
 #include "base/logging.h"
@@ skipping 48 matching lines @@
       break;
   }
 }
 
 }  // namespace
 
 // Converts NSHTTPCookie to net::CanonicalCookie.
 net::CanonicalCookie CanonicalCookieFromSystemCookie(
     NSHTTPCookie* cookie,
     const base::Time& ceation_time) {
-  return net::CanonicalCookie(
-      GURL(), base::SysNSStringToUTF8([cookie name]),
+  return *net::CanonicalCookie::Create(
+      base::SysNSStringToUTF8([cookie name]),
       base::SysNSStringToUTF8([cookie value]),
       base::SysNSStringToUTF8([cookie domain]),
       base::SysNSStringToUTF8([cookie path]), ceation_time,
       base::Time::FromDoubleT([[cookie expiresDate] timeIntervalSince1970]),
       base::Time(), [cookie isSecure], [cookie isHTTPOnly],
       // TODO(mkwst): When iOS begins to support 'SameSite' and 'Priority'
       // attributes, pass them through here.
       net::CookieSameSite::DEFAULT_MODE, net::COOKIE_PRIORITY_DEFAULT);
 }
 
@@ skipping 66 matching lines @@
   ResetCookieCountMetrics();
 }
 
 void ResetCookieCountMetrics() {
   NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
   [defaults setBool:NO forKey:kCheckCookieLossKey];
   [defaults synchronize];
 }
 
 }  // namespace net