Standardize usage of virtual/override/final specifiers.

extensions/browser/lazy_background_task_queue_unittest.cc

 // Copyright 2013 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/lazy_background_task_queue.h"
 
 #include "base/bind.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_browser_context.h"
@@ skipping 59 matching lines @@
 // Derives from ExtensionsTest to provide content module and keyed service
 // initialization.
 class LazyBackgroundTaskQueueTest : public ExtensionsTest {
  public:
   LazyBackgroundTaskQueueTest()
       : notification_service_(content::NotificationService::Create()),
         task_run_count_(0) {
     extensions_browser_client()->set_extension_system_factory(
         &extension_system_factory_);
   }
-  virtual ~LazyBackgroundTaskQueueTest() {}
+  ~LazyBackgroundTaskQueueTest() override {}
 
   int task_run_count() { return task_run_count_; }
 
   // A simple callback for AddPendingTask.
   void RunPendingTask(ExtensionHost* host) {
     task_run_count_++;
   }
 
   // Creates and registers an extension without a background page.
   scoped_refptr<Extension> CreateSimpleExtension() {
@@ skipping 120 matching lines @@
   EXPECT_EQ(1u, queue.extensions_with_pending_tasks());
 
   // Processing tasks when there is one pending runs the task and removes the
   // extension from the list of extensions with pending tasks.
   queue.ProcessPendingTasks(NULL, browser_context(), extension.get());
   EXPECT_EQ(1, task_run_count());
   EXPECT_EQ(0u, queue.extensions_with_pending_tasks());
 }
 
 }  // namespace extensions