Support Android username-only credentials.

components/password_manager/core/browser/password_manager_util.cc

Index: components/password_manager/core/browser/password_manager_util.cc
diff --git a/components/password_manager/core/browser/password_manager_util.cc b/components/password_manager/core/browser/password_manager_util.cc
index b2bffc852f1947b11cc2f6a6db1be38182ba8a8c..44123a03d1e77996a8b9cdd1608cfc4ca2ce6958 100644
--- a/components/password_manager/core/browser/password_manager_util.cc
+++ b/components/password_manager/core/browser/password_manager_util.cc
@@ -58,4 +58,20 @@ void FindDuplicates(
   forms->swap(unique_forms);
 }
 
+void TrimUsernameOnlyCredentials(
+    ScopedVector<autofill::PasswordForm>* android_credentials) {
+  ScopedVector<autofill::PasswordForm> result;
+  for (auto& form : *android_credentials) {
+    if (form->scheme == autofill::PasswordForm::SCHEME_USERNAME_ONLY) {
+      if (form->federation_url.is_empty())
+        continue;
+      else
+        form->skip_zero_click = true;
+    }
+    result.push_back(form);
+    form = nullptr;
+  }
+  android_credentials->swap(result);
+}
+
 }  // namespace password_manager_util