Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/captive_portal/captive_portal_tab_reloader_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 "chrome/browser/captive_portal/captive_portal_tab_reloader.h"
 
 #include "base/callback.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/captive_portal/captive_portal_service.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
@@ skipping 55 matching lines @@
   // destroys it.
   explicit MockInterstitialPageDelegate(
       content::WebContents* web_contents) {
     content::InterstitialPage* interstitial_page =
         content::InterstitialPage::Create(
             web_contents, true, GURL("http://blah"), this);
     interstitial_page->DontCreateViewForTesting();
     interstitial_page->Show();
   }
 
-  virtual ~MockInterstitialPageDelegate() {
-  }
+  ~MockInterstitialPageDelegate() override {}
 
  private:
   // InterstitialPageDelegate implementation:
-  virtual std::string GetHTMLContents() override {
-    return "HTML Contents";
-  }
+  std::string GetHTMLContents() override { return "HTML Contents"; }
 
   DISALLOW_COPY_AND_ASSIGN(MockInterstitialPageDelegate);
 };
 
 class CaptivePortalTabReloaderTest : public ChromeRenderViewHostTestHarness {
  public:
   // testing::Test:
   virtual void SetUp() override {
     ChromeRenderViewHostTestHarness::SetUp();
     tab_reloader_.reset(new testing::StrictMock<TestCaptivePortalTabReloader>(
@@ skipping 605 matching lines @@
 
   // There should be no captive portal check pending after the redirect.
   base::MessageLoop::current()->RunUntilIdle();
 
   // Logging in shouldn't do anything.
   tab_reloader().OnCaptivePortalResults(
       captive_portal::RESULT_BEHIND_CAPTIVE_PORTAL,
       captive_portal::RESULT_INTERNET_CONNECTED);
   EXPECT_EQ(CaptivePortalTabReloader::STATE_NONE, tab_reloader().state());
 }