Standardize usage of virtual/override/final specifiers.

chrome/browser/download/download_danger_prompt_browsertest.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 "base/bind.h"
 #include "base/files/file_path.h"
 #include "chrome/browser/download/download_danger_prompt.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ skipping 14 matching lines @@
 using ::testing::SaveArg;
 
 class DownloadDangerPromptTest : public InProcessBrowserTest {
  public:
   DownloadDangerPromptTest()
     : prompt_(NULL),
       expected_action_(DownloadDangerPrompt::CANCEL),
       did_receive_callback_(false) {
   }
 
-  virtual ~DownloadDangerPromptTest() {
-  }
+  ~DownloadDangerPromptTest() override {}
 
   // Opens a new tab and waits for navigations to finish. If there are pending
   // navigations, the constrained prompt might be dismissed when the navigation
   // completes.
   void OpenNewTab() {
     ui_test_utils::NavigateToURLWithDisposition(
         browser(), GURL("about:blank"),
         NEW_FOREGROUND_TAB,
         ui_test_utils::BROWSER_TEST_WAIT_FOR_TAB |
         ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
@@ skipping 98 matching lines @@
   download().NotifyObserversDownloadUpdated();
   SimulatePromptAction(DownloadDangerPrompt::ACCEPT);
   VerifyExpectations();
 
   // If the containing tab is closed, the dialog should DISMISS itself.
   OpenNewTab();
   SetUpExpectations(DownloadDangerPrompt::DISMISS);
   chrome::CloseTab(browser());
   VerifyExpectations();
 }