Use OnceCallback on Mojo interfaces in //components/autofill

chrome/browser/password_manager/chrome_password_manager_client_unittest.cc

Index: chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
diff --git a/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc b/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
index a1216c847230960cddb021b41095b0b8df8c66e2..a6b5270e032104993f989a34e0f5a2e5299f8f58 100644
--- a/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
+++ b/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
@@ -177,7 +177,7 @@ class FakePasswordAutofillAgent
       const autofill::FormsPredictionsMap& predictions) override {}
 
   void FindFocusedPasswordForm(
-      const FindFocusedPasswordFormCallback& callback) override {}
+      FindFocusedPasswordFormCallback callback) override {}
 
   // Records whether SetLoggingState() gets called.
   bool called_set_logging_state_;