Implement the "first-party-only" cookie flag.

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 971cf37eb01c4e2aaf349d05edc81b19b8f465b2..eff24f915c209caeace74e5a72fe1db2d42e857b 100644
--- a/net/cookies/parsed_cookie.h
+++ b/net/cookies/parsed_cookie.h
@@ -48,6 +48,7 @@ class NET_EXPORT ParsedCookie {
   const std::string& MaxAge() const { return pairs_[maxage_index_].second; }
   bool IsSecure() const { return secure_index_ != 0; }
   bool IsHttpOnly() const { return httponly_index_ != 0; }
+  bool IsFirstParty() const { return firstparty_index_ != 0; }
   CookiePriority Priority() const;
 
   // Returns the number of attributes, for example, returning 2 for:
@@ -67,6 +68,7 @@ class NET_EXPORT ParsedCookie {
   bool SetMaxAge(const std::string& maxage);
   bool SetIsSecure(bool is_secure);
   bool SetIsHttpOnly(bool is_http_only);
+  bool SetIsFirstParty(bool is_first_party);
   bool SetPriority(const std::string& priority);
 
   // Returns the cookie description as it appears in a HTML response header.
@@ -136,6 +138,7 @@ class NET_EXPORT ParsedCookie {
   size_t maxage_index_;
   size_t secure_index_;
   size_t httponly_index_;
+  size_t firstparty_index_;
   size_t priority_index_;
 
   DISALLOW_COPY_AND_ASSIGN(ParsedCookie);