Standardize usage of virtual/override/final specifiers.

chrome/browser/supervised_user/supervised_user_resource_throttle_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 "chrome/browser/supervised_user/supervised_user_resource_throttle.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 12 matching lines @@
 #include "content/public/test/test_navigation_observer.h"
 #include "content/public/test/test_utils.h"
 
 using content::MessageLoopRunner;
 using content::NavigationController;
 using content::WebContents;
 
 class SupervisedUserResourceThrottleTest : public InProcessBrowserTest {
  protected:
   SupervisedUserResourceThrottleTest() : supervised_user_service_(NULL) {}
-  virtual ~SupervisedUserResourceThrottleTest() {}
+  ~SupervisedUserResourceThrottleTest() override {}
 
  private:
   void SetUpOnMainThread() override;
   void SetUpCommandLine(CommandLine* command_line) override;
 
   SupervisedUserService* supervised_user_service_;
 };
 
 void SupervisedUserResourceThrottleTest::SetUpOnMainThread() {
   supervised_user_service_ =
@@ skipping 21 matching lines @@
       WebContents::Create(WebContents::CreateParams(profile)));
   NavigationController& controller = web_contents->GetController();
   content::TestNavigationObserver observer(web_contents.get());
   controller.LoadURL(GURL("http://www.example.com"), content::Referrer(),
                      ui::PAGE_TRANSITION_TYPED, std::string());
   observer.Wait();
   content::NavigationEntry* entry = controller.GetActiveEntry();
   ASSERT_TRUE(entry);
   EXPECT_EQ(content::PAGE_TYPE_INTERSTITIAL, entry->GetPageType());
 }