Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/net/cookie_util.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_NET_COOKIE_UTIL_H_
 #define IOS_CHROME_BROWSER_NET_COOKIE_UTIL_H_
 
+#include <memory>
+
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "net/cookies/canonical_cookie.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace ios {
 class ChromeBrowserState;
@@ skipping 49 matching lines @@
   const CookieStoreType cookie_store_type;
 
   // Used to provide encryption hooks for the cookie store. The
   // CookieCryptoDelegate must outlive any cookie store created with this
   // config.
   net::CookieCryptoDelegate* crypto_delegate;
 };
 
 // Creates a cookie store wich is internally either a CookieMonster or a
 // CookieStoreIOS.
-scoped_ptr<net::CookieStore> CreateCookieStore(const CookieStoreConfig& config);
+std::unique_ptr<net::CookieStore> CreateCookieStore(
+    const CookieStoreConfig& config);
 
 // Returns true if the cookies should be cleared.
 // Current implementation returns true if the device has rebooted since the
 // last time cookies have been cleared.
 bool ShouldClearSessionCookies();
 
 // Clears the session cookies for |browser_state|.
 void ClearSessionCookies(ios::ChromeBrowserState* browser_state);
 
 }  // namespace cookie_util
 
 #endif  // IOS_CHROME_BROWSER_NET_COOKIE_UTIL_H_