Standardize usage of virtual/override/final in extensions/

extensions/browser/guest_view/test_guest_view_manager.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_GUEST_VIEW_TEST_GUEST_VIEW_MANAGER_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_TEST_GUEST_VIEW_MANAGER_H_
 
 #include "base/memory/linked_ptr.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/guest_view/guest_view_manager.h"
 #include "extensions/browser/guest_view/guest_view_manager_factory.h"
 
 namespace extensions {
 
 class TestGuestViewManager : public GuestViewManager {
  public:
   explicit TestGuestViewManager(content::BrowserContext* context);
-  virtual ~TestGuestViewManager();
+  ~TestGuestViewManager() override;
 
   void WaitForAllGuestsDeleted();
   content::WebContents* WaitForSingleGuestCreated();
 
  private:
   // GuestViewManager override:
-  virtual void AddGuest(int guest_instance_id,
-                        content::WebContents* guest_web_contents) override;
-  virtual void RemoveGuest(int guest_instance_id) override;
+  void AddGuest(int guest_instance_id,
+                content::WebContents* guest_web_contents) override;
+  void RemoveGuest(int guest_instance_id) override;
 
   int GetNumGuests() const;
   content::WebContents* GetLastGuestCreated();
   void WaitForGuestCreated();
 
   std::vector<linked_ptr<content::WebContentsDestroyedWatcher>>
       guest_web_contents_watchers_;
   scoped_refptr<content::MessageLoopRunner> created_message_loop_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(TestGuestViewManager);
 };
 
 // Test factory for creating test instances of GuestViewManager.
 class TestGuestViewManagerFactory : public GuestViewManagerFactory {
  public:
   TestGuestViewManagerFactory();
-  virtual ~TestGuestViewManagerFactory();
+  ~TestGuestViewManagerFactory() override;
 
-  virtual GuestViewManager* CreateGuestViewManager(
+  GuestViewManager* CreateGuestViewManager(
       content::BrowserContext* context) override;
 
   TestGuestViewManager* GetManager(content::BrowserContext* context);
 
  private:
   TestGuestViewManager* test_guest_view_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(TestGuestViewManagerFactory);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_TEST_GUEST_VIEW_MANAGER_H_