Standardize usage of virtual/override/final specifiers.

ui/views/layout/box_layout_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 "ui/views/layout/box_layout.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/test/test_views.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 namespace {
 
 class BoxLayoutTest : public testing::Test {
  public:
-  virtual void SetUp() override {
-    host_.reset(new View);
-  }
+  void SetUp() override { host_.reset(new View); }
 
   scoped_ptr<View> host_;
 };
 
 }  // namespace
 
 TEST_F(BoxLayoutTest, Empty) {
   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 20);
   host_->SetLayoutManager(layout);
   EXPECT_EQ(gfx::Size(20, 20), layout->GetPreferredSize(host_.get()));
@@ skipping 574 matching lines @@
   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
   host_->SetLayoutManager(layout);
   View* v1 = new StaticSizedView(gfx::Size(20, 10));
   host_->AddChildView(v1);
   layout->set_minimum_cross_axis_size(30);
 
   EXPECT_EQ(gfx::Size(20, 30), layout->GetPreferredSize(host_.get()));
 }
 
 }  // namespace views