Clear password values before sending them to the renderer process.

components/autofill/core/common/password_form_fill_data.cc

Index: components/autofill/core/common/password_form_fill_data.cc
diff --git a/components/autofill/core/common/password_form_fill_data.cc b/components/autofill/core/common/password_form_fill_data.cc
index 9b1383046e093a10761cb08286e6735f047c4bfc..a75d9c5e3cac79f8def31eabcda66818e77f9434 100644
--- a/components/autofill/core/common/password_form_fill_data.cc
+++ b/components/autofill/core/common/password_form_fill_data.cc
@@ -90,4 +90,13 @@ void InitPasswordFormFillData(
   }
 }
 
+PasswordFormFillData ClearPasswordValues(const PasswordFormFillData& data) {
+  PasswordFormFillData result(data);
+  if (result.wait_for_username)
+    result.password_field.value.clear();
+  for (auto& credentials : result.additional_logins)
+    credentials.second.password.clear();
+  return result;
+}
+
 }  // namespace autofill