IsCommandIdEnabled should not fall though if the base did handle the command id

chrome/browser/renderer_context_menu/render_view_context_menu_unittest.cc

 // Copyright 2014 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 "chrome/browser/renderer_context_menu/render_view_context_menu.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
@@ skipping 271 matching lines @@
       menu->IsCommandIdEnabled(IDC_CONTENT_CONTEXT_OPENLINKOFFTHERECORD));
 
   // Disable Incognito mode.
   IncognitoModePrefs::SetAvailability(profile()->GetPrefs(),
                                       IncognitoModePrefs::DISABLED);
   menu.reset(CreateContextMenu());
   ASSERT_TRUE(menu->IsItemPresent(IDC_CONTENT_CONTEXT_OPENLINKOFFTHERECORD));
   EXPECT_FALSE(
       menu->IsCommandIdEnabled(IDC_CONTENT_CONTEXT_OPENLINKOFFTHERECORD));
 }
+
+// Make sure the checking custom command id that is not enabled will not
+// cause DCHECK failure.
+TEST_F(RenderViewContextMenuPrefsTest,
+       IsCustomCommandIdEnabled) {
+  scoped_ptr<TestRenderViewContextMenu> menu(CreateContextMenu());
+
+  EXPECT_FALSE(menu->IsCommandIdEnabled(IDC_CONTENT_CONTEXT_CUSTOM_FIRST));
+}