Standardize usage of virtual/override/final specifiers.

content/browser/transition_request_manager_unittest.cc

 // 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.
 
 #include "content/browser/transition_request_manager.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class TransitionRequestManagerTest : public testing::Test {
  public:
-  virtual ~TransitionRequestManagerTest() {}
+  ~TransitionRequestManagerTest() override {}
 };
 
 TEST_F(TransitionRequestManagerTest,
        ParseTransitionStylesheetsFromNullHeaders) {
   const GURL url("http://www.test.com/");
   std::vector<GURL> entering_stylesheets;
   scoped_refptr<net::HttpResponseHeaders> headers;
 
   TransitionRequestManager::ParseTransitionStylesheetsFromHeaders(
       headers, entering_stylesheets, url);
@@ skipping 72 matching lines @@
   ASSERT_TRUE(entering_stylesheets.size() == 3);
   ASSERT_STREQ((url.spec() + "transition0.css").c_str(),
                entering_stylesheets[0].spec().c_str());
   ASSERT_STREQ((url.spec() + "transition1.css").c_str(),
                entering_stylesheets[1].spec().c_str());
   ASSERT_STREQ((url.spec() + "transition2.css").c_str(),
                entering_stylesheets[2].spec().c_str());
 }
 
 }  // namespace content