Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/webui/profiler_ui.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_WEBUI_PROFILER_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PROFILER_UI_H_
 
 #include "base/memory/weak_ptr.h"
 #include "components/metrics/profiler/tracking_synchronizer_observer.h"
 #include "content/public/browser/web_ui_controller.h"
 
 // The C++ back-end for the chrome://profiler webui page.
 class ProfilerUI : public content::WebUIController,
                    public metrics::TrackingSynchronizerObserver {
  public:
   explicit ProfilerUI(content::WebUI* web_ui);
-  virtual ~ProfilerUI();
+  ~ProfilerUI() override;
 
   // Get the tracking data from TrackingSynchronizer.
   void GetData();
 
  private:
   // TrackingSynchronizerObserver:
-  virtual void ReceivedProfilerData(
+  void ReceivedProfilerData(
       const tracked_objects::ProcessDataSnapshot& profiler_data,
       int process_type) override;
 
   // Used to get |weak_ptr_| to self on the UI thread.
   base::WeakPtrFactory<ProfilerUI> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfilerUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PROFILER_UI_H_