MacViews: Remove redundant virtuals in NativeWidgetMac and co.

ui/views/controls/menu/menu_runner_cocoa_unittest.mm

 // 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.
 
 #import "ui/views/controls/menu/menu_runner_impl_cocoa.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/events/event_utils.h"
 #include "ui/views/test/views_test_base.h"
 
 namespace views {
 namespace test {
 
 class MenuRunnerCocoaTest : public ViewsTestBase {
  public:
   MenuRunnerCocoaTest() : runner_(NULL) {}
-  virtual ~MenuRunnerCocoaTest() {}
+  ~MenuRunnerCocoaTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ViewsTestBase::SetUp();
 
     menu_.reset(new ui::SimpleMenuModel(NULL));
     menu_->AddItem(0, base::ASCIIToUTF16("Menu Item"));
 
     runner_ = new internal::MenuRunnerImplCocoa(menu_.get());
     EXPECT_FALSE(runner_->IsRunning());
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     if (runner_) {
       runner_->Release();
       runner_ = NULL;
     }
 
     ViewsTestBase::TearDown();
   }
 
   // Runs the menu after scheduling |block| on the run loop.
   MenuRunner::RunResult RunMenu(dispatch_block_t block) {
@@ skipping 57 matching lines @@
   EXPECT_EQ(base::TimeDelta(), runner_->GetClosingEventTime());
 }
 
 TEST_F(MenuRunnerCocoaTest, DeleteWithoutRunning) {
   runner_->Release();
   runner_ = NULL;
 }
 
 }  // namespace test
 }  // namespace views