SameSite: Implement 'Strict'/'Lax' attribute parsing.

net/cookies/cookie_store_test_helpers.h

Index: net/cookies/cookie_store_test_helpers.h
diff --git a/net/cookies/cookie_store_test_helpers.h b/net/cookies/cookie_store_test_helpers.h
index 068296c7dc4f4cc846ef00e113f02c6191c41019..0ebae5bb9e23d5eac16b57737869a5d3f5be597c 100644
--- a/net/cookies/cookie_store_test_helpers.h
+++ b/net/cookies/cookie_store_test_helpers.h
@@ -41,7 +41,7 @@ class DelayedCookieMonster : public CookieStore {
                                  base::Time last_access_time,
                                  bool secure,
                                  bool http_only,
-                                 bool same_site,
+                                 CookieSameSite same_site,
                                  bool enforce_strict_secure,
                                  CookiePriority priority,
                                  const SetCookiesCallback& callback) override;