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

chrome/browser/ui/webui/about_ui.cc

 // 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.
 
 #include "chrome/browser/ui/webui/about_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 107 matching lines @@
 // Handling about:memory is complicated enough to encapsulate its related
 // methods into a single class. The user should create it (on the heap) and call
 // its |StartFetch()| method.
 class AboutMemoryHandler : public MemoryDetails {
  public:
   explicit AboutMemoryHandler(
       const content::URLDataSource::GotDataCallback& callback)
       : callback_(callback) {
   }
 
-  virtual void OnDetailsAvailable() override;
+  void OnDetailsAvailable() override;
 
  private:
-  virtual ~AboutMemoryHandler() {}
+  ~AboutMemoryHandler() override {}
 
   void BindProcessMetrics(base::DictionaryValue* data,
                           ProcessMemoryInformation* info);
   void AppendProcess(base::ListValue* child_data,
                      ProcessMemoryInformation* info);
 
   content::URLDataSource::GotDataCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(AboutMemoryHandler);
 };
@@ skipping 1020 matching lines @@
   Profile* profile = Profile::FromWebUI(web_ui);
 
 #if defined(ENABLE_THEMES)
   // Set up the chrome://theme/ source.
   ThemeSource* theme = new ThemeSource(profile);
   content::URLDataSource::Add(profile, theme);
 #endif
 
   content::URLDataSource::Add(profile, new AboutUIHTMLSource(name, profile));
 }