Standardize usage of virtual/override/final specifiers.

ui/views/widget/native_widget_unittest.cc

 // Copyright (c) 2012 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 "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/controls/native/native_view_host.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/native_widget_private.h"
 #include "ui/views/widget/widget.h"
@@ skipping 17 matching lines @@
   internal::NativeWidgetPrivate* get() const { return native_widget_; }
 
  private:
   internal::NativeWidgetPrivate* native_widget_;
   DISALLOW_COPY_AND_ASSIGN(ScopedTestWidget);
 };
 
 class NativeWidgetTest : public ViewsTestBase {
  public:
   NativeWidgetTest() {}
-  virtual ~NativeWidgetTest() {}
+  ~NativeWidgetTest() override {}
 
   internal::NativeWidgetPrivate* CreateNativeWidgetOfType(
       Widget::InitParams::Type type) {
     Widget* widget = new Widget;
     Widget::InitParams params = CreateParams(type);
     params.ownership = views::Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET;
     params.bounds = gfx::Rect(10, 10, 200, 200);
     widget->Init(params);
     return widget->native_widget_private();
   }
@@ skipping 41 matching lines @@
   // |child_host| owns |child_widget|.
   internal::NativeWidgetPrivate* child_widget = CreateNativeSubWidget();
   child_host->Attach(child_widget->GetWidget()->GetNativeView());
 
   EXPECT_EQ(toplevel_widget.get(),
             internal::NativeWidgetPrivate::GetTopLevelNativeWidget(
                 child_widget->GetWidget()->GetNativeView()));
 }
 
 }  // namespace views