Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/webui/interstitials/interstitial_ui_browsertest.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 "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/devtools/devtools_window_testing.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 
 class InterstitialUITest : public InProcessBrowserTest {
  public:
    InterstitialUITest() {}
-   virtual ~InterstitialUITest() {}
+   ~InterstitialUITest() override {}
 
  protected:
   void TestInterstitial(GURL url, const std::string& page_title) {
     ui_test_utils::NavigateToURL(browser(), url);
     EXPECT_EQ(
       base::ASCIIToUTF16(page_title),
       browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
 
     // Should also be able to open and close devtools.
     DevToolsWindow* window =
@@ skipping 20 matching lines @@
   TestInterstitial(
       GURL("chrome://interstitials/safebrowsing?type=phishing"),
       "Security error");
   TestInterstitial(
       GURL("chrome://interstitials/safebrowsing?type=clientside_malware"),
       "Security error");
   TestInterstitial(
       GURL("chrome://interstitials/safebrowsing?type=clientside_phishing"),
       "Security error");
 }