Fix flaky CredentialManagerBrowserTest.AutoSigninOldCredentialAndNavigation.

chrome/browser/password_manager/credential_manager_browsertest.cc

Index: chrome/browser/password_manager/credential_manager_browsertest.cc
diff --git a/chrome/browser/password_manager/credential_manager_browsertest.cc b/chrome/browser/password_manager/credential_manager_browsertest.cc
index 978620b2821d5e49f899747b22aa1efc1b773365..388d76429db472803a46f02b4f8683636612eed3 100644
--- a/chrome/browser/password_manager/credential_manager_browsertest.cc
+++ b/chrome/browser/password_manager/credential_manager_browsertest.cc
@@ -117,16 +117,9 @@ IN_PROC_BROWSER_TEST_F(CredentialManagerBrowserTest,
   EXPECT_FALSE(form.skip_zero_click);
 }
 
-// TODO(crbug.com/626759): flakily failing on Mac.
-#if defined(OS_MACOSX)
-#define MAYBE_AutoSigninOldCredentialAndNavigation \
-    DISABLED_AutoSigninOldCredentialAndNavigation
-#else
-#define MAYBE_AutoSigninOldCredentialAndNavigation \
-    AutoSigninOldCredentialAndNavigation
-#endif
+
 IN_PROC_BROWSER_TEST_F(CredentialManagerBrowserTest,
-                       MAYBE_AutoSigninOldCredentialAndNavigation) {
+                       AutoSigninOldCredentialAndNavigation) {
   // Save credentials with 'skip_zero_click' false.
   scoped_refptr<password_manager::TestPasswordStore> password_store =
       static_cast<password_manager::TestPasswordStore*>(
@@ -150,11 +143,15 @@ IN_PROC_BROWSER_TEST_F(CredentialManagerBrowserTest,
   "document.getElementById('password_field').value = 'trash';";
   ASSERT_TRUE(content::ExecuteScript(RenderViewHost(), fill_password));
 
-  // Call the API to trigger the notification to the client.
+  // Call the API with a delay to trigger the notification to the client. The
+  // delay ensures that parsing password forms won't happen again after the API
+  // call making the test flaky.
   ASSERT_TRUE(content::ExecuteScript(
       RenderViewHost(),
-      "navigator.credentials.get({password: true})"
-      ".then(cred => window.location = '/password/done.html')"));
+      "setTimeout( function() {"
+        "navigator.credentials.get({password: true})"
+        ".then(cred => window.location = '/password/done.html');"
+      "}, 1000)"));
 
   NavigationObserver observer(WebContents());
   observer.SetPathToWaitFor("/password/done.html");