Standardize usage of virtual/override/final specifiers.

chrome/test/chromedriver/net/net_util_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 <string>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
@@ skipping 26 matching lines @@
     context_getter_ = new URLRequestContextGetter(
         io_thread_.message_loop_proxy());
     base::WaitableEvent event(false, false);
     io_thread_.message_loop_proxy()->PostTask(
         FROM_HERE,
         base::Bind(&FetchUrlTest::InitOnIO,
                    base::Unretained(this), &event));
     event.Wait();
   }
 
-  virtual ~FetchUrlTest() {
+  ~FetchUrlTest() override {
     base::WaitableEvent event(false, false);
     io_thread_.message_loop_proxy()->PostTask(
         FROM_HERE,
         base::Bind(&FetchUrlTest::DestroyServerOnIO,
                    base::Unretained(this), &event));
     event.Wait();
   }
 
   void InitOnIO(base::WaitableEvent* event) {
     scoped_ptr<net::ServerSocket> server_socket(
@@ skipping 72 matching lines @@
   ASSERT_FALSE(FetchUrl(server_url_, context_getter_.get(), &response));
   ASSERT_STREQ("stuff", response.c_str());
 }
 
 TEST_F(FetchUrlTest, NoServer) {
   std::string response("stuff");
   ASSERT_FALSE(
       FetchUrl("http://localhost:33333", context_getter_.get(), &response));
   ASSERT_STREQ("stuff", response.c_str());
 }