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

chrome/browser/download/download_ui_controller.cc

 // Copyright 2013 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_ui_controller.h"
 
 #include "base/callback.h"
 #include "base/stl_util.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/ui/browser_finder.h"
@@ skipping 39 matching lines @@
   content::DownloadControllerAndroid::Get()->OnDownloadStarted(item);
 }
 
 #else  // OS_ANDROID
 
 class DefaultUIControllerDelegate : public DownloadUIController::Delegate {
  public:
   // |profile| is required to outlive DefaultUIControllerDelegate.
   explicit DefaultUIControllerDelegate(Profile* profile)
       : profile_(profile) {}
-  virtual ~DefaultUIControllerDelegate() {}
+  ~DefaultUIControllerDelegate() override {}
 
  private:
   // DownloadUIController::Delegate
-  virtual void OnNewDownloadReady(content::DownloadItem* item) override;
+  void OnNewDownloadReady(content::DownloadItem* item) override;
 
   Profile* profile_;
 };
 
 void DefaultUIControllerDelegate::OnNewDownloadReady(
     content::DownloadItem* item) {
   content::WebContents* web_contents = item->GetWebContents();
   Browser* browser =
       web_contents ? chrome::FindBrowserWithWebContents(web_contents) : NULL;
 
@@ skipping 51 matching lines @@
   if (item_model.WasUINotified() || !item_model.ShouldNotifyUI())
     return;
 
   // Wait until the target path is determined.
   if (item->GetTargetFilePath().empty())
     return;
 
   DownloadItemModel(item).SetWasUINotified(true);
   delegate_->OnNewDownloadReady(item);
 }