Account for server vs host clock skew in cookie expiration times.

net/cookies/canonical_cookie.h

 // Copyright (c) 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 NET_COOKIES_CANONICAL_COOKIE_H_
 #define NET_COOKIES_CANONICAL_COOKIE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 99 matching lines @@
   bool IsOnPath(const std::string& url_path) const;
   bool IsDomainMatch(const std::string& scheme, const std::string& host) const;
 
   std::string DebugString() const;
 
   // Returns the cookie source when cookies are set for |url|.  This function
   // is public for unit test purposes only.
   static std::string GetCookieSourceFromURL(const GURL& url);
   static std::string CanonPath(const GURL& url, const ParsedCookie& pc);
   static base::Time CanonExpiration(const ParsedCookie& pc,
-                                    const base::Time& current);
+                                    const base::Time& current,
+                                    const base::Time& server_time);
 
  private:
   // The source member of a canonical cookie is the origin of the URL that tried
   // to set this cookie, minus the port number if any.  This field is not
   // persistent though; its only used in the in-tab cookies dialog to show the
   // user the source URL. This is used for both allowed and blocked cookies.
   // When a CanonicalCookie is constructed from the backing store (common case)
   // this field will be null.  CanonicalCookie consumers should not rely on
   // this field unless they guarantee that the creator of those
   // CanonicalCookies properly initialized the field.
@@ skipping 10 matching lines @@
   base::Time last_access_date_;
   bool secure_;
   bool httponly_;
 };
 
 typedef std::vector<CanonicalCookie> CookieList;
 
 }  // namespace net
 
 #endif  // NET_COOKIES_CANONICAL_COOKIE_H_