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

chrome/browser/download/download_status_updater_mac.mm

 // Copyright 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/download/download_status_updater.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 83 matching lines @@
 }
 
 const char kCrNSProgressUserDataKey[] = "CrNSProgressUserData";
 
 class CrNSProgressUserData : public base::SupportsUserData::Data {
  public:
   CrNSProgressUserData(NSProgress* progress, const base::FilePath& target)
       : target_(target) {
     progress_.reset(progress);
   }
-  virtual ~CrNSProgressUserData() {
-    [progress_.get() unpublish];
-  }
+  ~CrNSProgressUserData() override { [progress_.get() unpublish]; }
 
   NSProgress* progress() const { return progress_.get(); }
   base::FilePath target() const { return target_; }
   void setTarget(const base::FilePath& target) { target_ = target; }
 
  private:
   base::scoped_nsobject<NSProgress> progress_;
   base::FilePath target_;
 };
 
@@ skipping 127 matching lines @@
     }
 
     // Notify the Finder.
     NSString* parent_path = [download_path stringByDeletingLastPathComponent];
     FNNotifyByPath(
         reinterpret_cast<const UInt8*>([parent_path fileSystemRepresentation]),
         kFNDirectoryModifiedMessage,
         kNilOptions);
   }
 }