Remove the force_session cookie option, as it's not used anymore

chrome/browser/ui/gtk/gtk_chrome_cookie_view.cc

Index: chrome/browser/ui/gtk/gtk_chrome_cookie_view.cc
diff --git a/chrome/browser/ui/gtk/gtk_chrome_cookie_view.cc b/chrome/browser/ui/gtk/gtk_chrome_cookie_view.cc
index 07a37014ab2ce66e3f8ae52de0a59bca2609a074..bccd0441d2259dafe436fcc2c9e8b2e67cb82707 100644
--- a/chrome/browser/ui/gtk/gtk_chrome_cookie_view.cc
+++ b/chrome/browser/ui/gtk/gtk_chrome_cookie_view.cc
@@ -478,7 +478,7 @@ void gtk_chrome_cookie_view_display_cookie(
                      UTF16ToUTF8(base::TimeFormatFriendlyDateAndTime(
                          cookie.CreationDate())).c_str());
 
-  std::string expire_text = cookie.DoesExpire() ?
+  std::string expire_text = cookie.IsPersistent() ?
       UTF16ToUTF8(base::TimeFormatFriendlyDateAndTime(cookie.ExpiryDate())) :
       l10n_util::GetStringUTF8(IDS_COOKIES_COOKIE_EXPIRES_SESSION);
 
@@ -490,7 +490,7 @@ void gtk_chrome_cookie_view_display_cookie(
     GtkTreeIter iter;
     gtk_list_store_clear(store);
 
-    if (cookie.DoesExpire()) {
+    if (cookie.IsPersistent()) {
       gtk_list_store_append(store, &iter);
       gtk_list_store_set(store, &iter, 0, expire_text.c_str(), -1);
     }