Standardize usage of virtual/override/final in mojo/

mojo/shell/ui_application_loader_android.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 MOJO_SHELL_UI_APPLICATION_LOADER_ANDROID_H_
 #define MOJO_SHELL_UI_APPLICATION_LOADER_ANDROID_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "mojo/application_manager/application_loader.h"
 
 namespace mojo {
 
 class ApplicationManager;
 
 namespace shell {
 class Context;
 }
 
 // ApplicationLoader implementation that creates a background thread and issues
 // load
 // requests there.
 class UIApplicationLoader : public ApplicationLoader {
  public:
   UIApplicationLoader(scoped_ptr<ApplicationLoader> real_loader,
                       shell::Context* context);
-  virtual ~UIApplicationLoader();
+  ~UIApplicationLoader() override;
 
   // ApplicationLoader overrides:
-  virtual void Load(ApplicationManager* manager,
-                    const GURL& url,
-                    scoped_refptr<LoadCallbacks> callbacks) override;
-  virtual void OnApplicationError(ApplicationManager* manager,
-                                  const GURL& url) override;
+  void Load(ApplicationManager* manager,
+            const GURL& url,
+            scoped_refptr<LoadCallbacks> callbacks) override;
+  void OnApplicationError(ApplicationManager* manager,
+                          const GURL& url) override;
 
  private:
   class UILoader;
 
   // These functions are exected on the background thread. They call through
   // to |background_loader_| to do the actual loading.
   // TODO: having this code take a |manager| is fragile (as ApplicationManager
   // isn't thread safe).
   void LoadOnUIThread(ApplicationManager* manager,
                       const GURL& url,
                       ScopedMessagePipeHandle* shell_handle);
   void OnApplicationErrorOnUIThread(ApplicationManager* manager,
                                     const GURL& url);
   void ShutdownOnUIThread();
 
   scoped_ptr<ApplicationLoader> loader_;
   shell::Context* context_;
 
   // Lives on the UI thread. Trivial interface that calls through to |loader_|.
   UILoader* ui_loader_;
 
   DISALLOW_COPY_AND_ASSIGN(UIApplicationLoader);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_UI_APPLICATION_LOADER_ANDROID_H_