[iOS] Upstream //ios/net

ios/net/cookies/cookie_creation_time_manager.h

Index: ios/net/cookies/cookie_creation_time_manager.h
diff --git a/ios/net/cookies/cookie_creation_time_manager.h b/ios/net/cookies/cookie_creation_time_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..42b9a429b6d826efc74b878ea99d94f55f4cf6f9
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+++ b/ios/net/cookies/cookie_creation_time_manager.h
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+// 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_NET_COOKIES_COOKIE_CREATION_TIME_MANAGER_H_
+#define IOS_NET_COOKIES_COOKIE_CREATION_TIME_MANAGER_H_
+
+#include <set>
+
+#include "base/containers/hash_tables.h"
+#include "base/threading/thread_checker.h"
+#include "base/time/time.h"
+
+@class NSHTTPCookie;
+
+namespace net {
+
+// The CookieCreationTimeManager allows to get and set the creation time of a
+// NSHTTPCookie.
+// Creation time data is stored either in the cookie properties (when the cookie
+// is created by the system) or in |creation_times_| (when the cookie is created
+// by CookieStoreIOS). When both are available, |creation_times_| is used,
+// because the cookie property only has a one second precision.
+class CookieCreationTimeManager {
+ public:
+  CookieCreationTimeManager();
+  ~CookieCreationTimeManager();
+  // Sets the creation time for |cookie|.
+  // |creation_time| must be unique (not used by another cookie).
+  void SetCreationTime(NSHTTPCookie* cookie, const base::Time& creation_time);
+  // Creates a unique creation time (to be used in SetCreationTime()) that is
+  // as close as possible to |creation_time|.
+  base::Time MakeUniqueCreationTime(const base::Time& creation_time);
+  // Gets the creation time for |cookie|.
+  base::Time GetCreationTime(NSHTTPCookie* cookie);
+  // Deletes the creation time for |cookie|.
+  void DeleteCreationTime(NSHTTPCookie* cookie);
+  // Clears all the creation times.
+  void Clear();
+
+ private:
+  base::hash_map<std::string, base::Time> creation_times_;
+  std::set<base::Time> unique_times_;
+  base::ThreadChecker thread_checker_;
+};
+
+}  // namespace net
+
+#endif  // IOS_NET_COOKIES_COOKIE_CREATION_TIME_MANAGER_H_