When parsing cookie expiration times, saturate out of range dates

net/cookies/cookie_util.h

Index: net/cookies/cookie_util.h
diff --git a/net/cookies/cookie_util.h b/net/cookies/cookie_util.h
index 0bf1452af864015331c1491ad50f78d1652e81dc..343ca503596b860311f4e0594beef71a8162e999 100644
--- a/net/cookies/cookie_util.h
+++ b/net/cookies/cookie_util.h
@@ -37,8 +37,19 @@ NET_EXPORT bool GetCookieDomainWithString(const GURL& url,
 // i.e. it doesn't begin with a leading '.' character.
 NET_EXPORT bool DomainIsHostOnly(const std::string& domain_string);
 
-// Parses the string with the cookie time (very forgivingly).
-NET_EXPORT base::Time ParseCookieTime(const std::string& time_string);
+// Parses the string with the cookie expiration time (very forgivingly).
+// Returns the "null" time on failure.
+//
+// If the expiration date is either too small or too large (there are
+// platform-specific limits for allowed date ranges), then it will be clipped
+// to the min/max time Time::FromUTCExploded() can return on the current
+// platform,
+// rather than failing. In particular:
+//
+// On non-Mac 32-bit POSIX, times will currently be clamped between 1970 and
+// 2038.
+// On Windows, times will currently be clamped between year 1601 and 30827.
+NET_EXPORT base::Time ParseCookieExpirationTime(const std::string& time_string);
 
 // Convenience for converting a cookie origin (domain and https pair) to a URL.
 NET_EXPORT GURL CookieOriginToURL(const std::string& domain, bool is_https);