Update cookie value and attribute setting behavior to match other UAs

net/cookies/parsed_cookie.h

Index: net/cookies/parsed_cookie.h
diff --git a/net/cookies/parsed_cookie.h b/net/cookies/parsed_cookie.h
index f48015dbd2f56ed0d18dc5c2b4cedaba65c658e8..aed763502c11407640fce44bb0621d38285e8b09 100644
--- a/net/cookies/parsed_cookie.h
+++ b/net/cookies/parsed_cookie.h
@@ -84,7 +84,8 @@ class NET_EXPORT ParsedCookie {
   // returns as output arguments token_start and token_end to the start and end
   // positions of a cookie attribute token name parsed from the segment, and
   // updates the segment iterator to point to the next segment to be parsed.
-  // If no token is found, the function returns false.
+  // If no token is found, the function returns false and the segment iterator
+  // is set to end.
   static bool ParseToken(std::string::const_iterator* it,
                          const std::string::const_iterator& end,
                          std::string::const_iterator* token_start,