Standardize usage of virtual/override/final specifiers.

extensions/browser/guest_view/guest_view_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 "extensions/browser/guest_view/guest_view_manager.h"
 
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_browser_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/web_contents_tester.h"
@@ skipping 27 matching lines @@
 };
 
 } // namespace guestview
 
 namespace {
 
 class GuestViewManagerTest : public extensions::ExtensionsTest {
  public:
   GuestViewManagerTest() :
     notification_service_(content::NotificationService::Create()) {}
-  virtual ~GuestViewManagerTest() {}
+  ~GuestViewManagerTest() override {}
 
   scoped_ptr<WebContents> CreateWebContents() {
     return scoped_ptr<WebContents>(
         WebContentsTester::CreateTestWebContents(&browser_context_, NULL));
   }
 
  private:
   scoped_ptr<content::NotificationService> notification_service_;
   content::TestBrowserThreadBundle thread_bundle_;
   content::TestBrowserContext browser_context_;
@@ skipping 41 matching lines @@
   EXPECT_EQ(3, manager->last_instance_id_removed_for_testing());
 
   EXPECT_FALSE(manager->CanUseGuestInstanceID(1));
   EXPECT_FALSE(manager->CanUseGuestInstanceID(2));
   EXPECT_FALSE(manager->CanUseGuestInstanceID(3));
 
   EXPECT_EQ(0u, manager->GetRemovedInstanceIdSize());
 }
 
 }  // namespace extensions