Add the button style for combobox

ui/views/test/menu_runner_test_api.cc

+// Copyright 2013 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 "ui/views/test/menu_runner_test_api.h"
+
+#include "ui/views/controls/menu/menu_runner.h"
+
+namespace views {
+namespace test {
+
+MenuRunnerTestAPI::MenuRunnerTestAPI(MenuRunner* menu_runner)
+    : menu_runner_(menu_runner) {
+}
+
+MenuRunnerTestAPI::~MenuRunnerTestAPI() {
+}
+
+void MenuRunnerTestAPI::SetRunnerHandler(MenuRunnerHandler* runner_handler) {
+  menu_runner_->SetRunnerHandler(runner_handler);
+}
+
+}  // test
+}  // views