Disable a ManagedProfileUITest on Mac

chrome/browser/ui/webui/options/manage_profile_browsertest.js

Index: chrome/browser/ui/webui/options/manage_profile_browsertest.js
diff --git a/chrome/browser/ui/webui/options/manage_profile_browsertest.js b/chrome/browser/ui/webui/options/manage_profile_browsertest.js
index 4e0cca55dcf3533928702f19f220e260f0d15b4e..a0d2301cf1bfa11c713ae46723120edd1bc78ed5 100644
--- a/chrome/browser/ui/webui/options/manage_profile_browsertest.js
+++ b/chrome/browser/ui/webui/options/manage_profile_browsertest.js
@@ -341,7 +341,14 @@ TEST_F('ManageProfileUITest', 'NoCreateConfirmationOnError', function() {
 });
 
 // The name and email should be inserted into the confirmation dialog.
-TEST_F('ManageProfileUITest', 'CreateConfirmationText', function() {
+// Disbaled because of flakiness on Mac: crbug.com/405709
+GEN('#if defined(OS_MACOSX)');
+GEN('#define MAYBE_CreateConfirmationText \\');
+GEN('    DISABLED_CreateConfirmationText');
+GEN('#else');
+GEN('#define MAYBE_CreateConfirmationText CreateConfirmationText');
+GEN('#endif');
+TEST_F('ManageProfileUITest', 'MAYBE_CreateConfirmationText', function() {
   var self = this;
   var custodianEmail = 'foo@example.com';