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

chrome/browser/browsing_data/browsing_data_remover_test_util.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_BROWSING_DATA_BROWSING_DATA_REMOVER_TEST_UTIL_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_TEST_UTIL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "content/public/test/test_utils.h"
 
 class BrowsingDataRemoverCompletionObserver
     : public BrowsingDataRemover::Observer {
  public:
   explicit BrowsingDataRemoverCompletionObserver(BrowsingDataRemover* remover);
-  virtual ~BrowsingDataRemoverCompletionObserver();
+  ~BrowsingDataRemoverCompletionObserver() override;
 
   void BlockUntilCompletion();
 
  protected:
   // BrowsingDataRemover::Observer:
-  virtual void OnBrowsingDataRemoverDone() override;
+  void OnBrowsingDataRemoverDone() override;
 
  private:
   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemoverCompletionObserver);
 };
 
 class BrowsingDataRemoverCompletionInhibitor
     : public BrowsingDataRemover::CompletionInhibitor {
  public:
   BrowsingDataRemoverCompletionInhibitor();
-  virtual ~BrowsingDataRemoverCompletionInhibitor();
+  ~BrowsingDataRemoverCompletionInhibitor() override;
 
   void BlockUntilNearCompletion();
   void ContinueToCompletion();
 
  protected:
   // BrowsingDataRemover::CompletionInhibitor:
-  virtual void OnBrowsingDataRemoverWouldComplete(
+  void OnBrowsingDataRemoverWouldComplete(
       BrowsingDataRemover* remover,
       const base::Closure& continue_to_completion) override;
 
  private:
   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
   base::Closure continue_to_completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemoverCompletionInhibitor);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_TEST_UTIL_H_