Add menuhide event to menu button.

chrome/test/data/webui/webui_resource_browsertest.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 <vector>
 
 #include "base/path_service.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/grit/options_test_resources.h"
@@ skipping 169 matching lines @@
   AddLibrary(IDR_WEBUI_JS_CR);
   AddLibrary(IDR_WEBUI_JS_CR_EVENT_TARGET);
   AddLibrary(IDR_WEBUI_JS_CR_UI);
   AddLibrary(IDR_WEBUI_JS_CR_UI_POSITION_UTIL);
   AddLibrary(IDR_WEBUI_JS_CR_UI_MENU_ITEM);
   AddLibrary(IDR_WEBUI_JS_CR_UI_MENU_BUTTON);
   AddLibrary(IDR_WEBUI_JS_CR_UI_MENU);
   AddLibrary(IDR_WEBUI_JS_CR_UI_CONTEXT_MENU_HANDLER);
   RunTest(base::FilePath(FILE_PATH_LITERAL("context_menu_handler_test.html")));
 }
+
+IN_PROC_BROWSER_TEST_F(WebUIResourceBrowserTest, MenuButtonTest) {
+  AddLibrary(IDR_WEBUI_JS_ASSERT);
+  AddLibrary(IDR_WEBUI_JS_EVENT_TRACKER);
+  AddLibrary(IDR_WEBUI_JS_CR);
+  AddLibrary(IDR_WEBUI_JS_CR_UI);
+  AddLibrary(IDR_WEBUI_JS_CR_UI_POSITION_UTIL);
+  AddLibrary(IDR_WEBUI_JS_CR_UI_MENU_BUTTON);
+  AddLibrary(IDR_WEBUI_JS_CR_UI_MENU);
+  RunTest(base::FilePath(FILE_PATH_LITERAL("menu_button_test.html")));
+}