Standardize usage of virtual/override/final specifiers.

ui/views/controls/tree/tree_view_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/controls/tree/tree_view.h"
 
 #include <string>
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/models/tree_node_model.h"
 #include "ui/views/controls/prefix_selector.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/test/views_test_base.h"
 
 using ui::TreeModel;
 using ui::TreeModelNode;
 using ui::TreeNode;
 
 using base::ASCIIToUTF16;
 
 namespace views {
 
 class TestNode : public TreeNode<TestNode> {
  public:
   TestNode() {}
-  virtual ~TestNode() {}
+  ~TestNode() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestNode);
 };
 
 // Creates the following structure:
 // 'root'
 //   'a'
 //   'b'
 //     'b1'
@@ skipping 377 matching lines @@
   tree_.SetSelectedNode(GetNodeByTitle("root"));
   ExpandOrSelectChild();
   tree_.SetEditable(true);
   tree_.StartEditing(GetNodeByTitle("a"));
   tree_.editor()->SetText(ASCIIToUTF16("a changed"));
   tree_.OnDidChangeFocus(NULL, NULL);
   EXPECT_TRUE(GetNodeByTitle("a changed") != NULL);
 }
 
 }  // namespace views