Componentize autofill dialog common code

components/autofill/core/browser/detail_input.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/autofill/core/browser/detail_input.h"
+
+namespace autofill {
+
+// Street address is multi-line, except in countries where it shares a line
+// with other inputs (such as Coite d'Ivoire).
+bool DetailInput::IsMultiline() const {
+  return (type == ADDRESS_HOME_STREET_ADDRESS ||
+          type == ADDRESS_BILLING_STREET_ADDRESS) &&
+         length == DetailInput::LONG;
+}
+
+}  // namespace autofill