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

chrome/browser/thumbnails/thumbnail_list_source.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 CHROME_BROWSER_THUMBNAILS_THUMBNAIL_LIST_SOURCE_H_
 #define CHROME_BROWSER_THUMBNAILS_THUMBNAIL_LIST_SOURCE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 14 matching lines @@
 
 // ThumbnailListSource renders a webpage to list all thumbnails stored in
 // TopSites, along with all associated URLs. The thumbnail images are embedded
 // into the HTML via Base64, so we can easily produce a dump of TopSites and
 // the thumbnails it stores.
 class ThumbnailListSource : public content::URLDataSource {
  public:
   explicit ThumbnailListSource(Profile* profile);
 
   // content::URLDataSource implementation.
-  virtual std::string GetSource() const override;
-  virtual void StartDataRequest(
+  std::string GetSource() const override;
+  void StartDataRequest(
       const std::string& path,
       int render_process_id,
       int render_frame_id,
       const content::URLDataSource::GotDataCallback& callback) override;
-  virtual std::string GetMimeType(const std::string& path) const override;
-  virtual base::MessageLoop* MessageLoopForRequestPath(
+  std::string GetMimeType(const std::string& path) const override;
+  base::MessageLoop* MessageLoopForRequestPath(
       const std::string& path) const override;
-  virtual bool ShouldServiceRequest(
-      const net::URLRequest* request) const override;
-  virtual bool ShouldReplaceExistingSource() const override;
+  bool ShouldServiceRequest(const net::URLRequest* request) const override;
+  bool ShouldReplaceExistingSource() const override;
 
  private:
-  virtual ~ThumbnailListSource();
+  ~ThumbnailListSource() override;
 
   void OnMostVisitedURLsAvailable(
     const content::URLDataSource::GotDataCallback& callback,
     const history::MostVisitedURLList& mvurl_list);
 
   // ThumbnailService.
   scoped_refptr<thumbnails::ThumbnailService> thumbnail_service_;
 
   // Only used when servicing requests on the UI thread.
   Profile* const profile_;
 
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<ThumbnailListSource> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ThumbnailListSource);
 };
 
 
 #endif  // CHROME_BROWSER_THUMBNAILS_THUMBNAIL_LIST_SOURCE_H_