[FIX]Password error in backup database.

lp bug: https://launchpad.net/bugs/986781 fixed

bzr revid: vja@vja-desktop-20120515090051-mg8xi4pdt4dbal1l

addons/web/static/src/js/chrome.js

@@ -392,7 +392,14 @@ instance.web.DatabaseManager = instance.web.Widget.extend({
             success: function () {
                 self.do_notify(_t("Backed"), _t("Database backed up successfully"));
             },
-            error: instance.webclient.crashmanager.on_rpc_error,
+            error: function(){
+                if (instance.webclient.crashmanager.on_rpc_error) {
+                    self.display_error({
+                        title: 'Backup Database',
+                        error: 'AccessDenied'
+                    });
+                }
+            },
             complete: function() {
                 self.unblockUI();
             }