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

components/signin/core/browser/gaia_cookie_manager_service.cc

Index: components/signin/core/browser/gaia_cookie_manager_service.cc
diff --git a/components/signin/core/browser/gaia_cookie_manager_service.cc b/components/signin/core/browser/gaia_cookie_manager_service.cc
index ecbad16b1a58e284f15a74ac4e26f4263232c425..9ed37994b0b2316311398453fb433da0c1ae6827 100644
--- a/components/signin/core/browser/gaia_cookie_manager_service.cc
+++ b/components/signin/core/browser/gaia_cookie_manager_service.cc
@@ -373,10 +373,10 @@ void GaiaCookieManagerService::TriggerListAccounts() {
 
 void GaiaCookieManagerService::ForceOnCookieChangedProcessing() {
   GURL google_url = GaiaUrls::GetInstance()->google_url();
-  net::CanonicalCookie cookie(google_url, kGaiaCookieName, "",
-                              google_url.host(), "", base::Time(), base::Time(),
-                              base::Time(), false, false, false,
-                              net::COOKIE_PRIORITY_DEFAULT);
+  net::CanonicalCookie cookie(
+      google_url, kGaiaCookieName, "", google_url.host(), "", base::Time(),
+      base::Time(), base::Time(), false, false,
+      net::CookieSameSite::DEFAULT_MODE, net::COOKIE_PRIORITY_DEFAULT);
   OnCookieChanged(cookie, true);
 }