Remove stl_util's deletion function use and ScopedVector from chrome/browser/download/.

chrome/browser/download/download_status_updater.h

 // 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.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_
 
+#include <memory>
 #include <set>
 
 #include "base/macros.h"
 #include "chrome/browser/download/all_download_item_notifier.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager.h"
 
 // Keeps track of download progress for the entire browser.
 class DownloadStatusUpdater
   : public AllDownloadItemNotifier::Observer {
@@ skipping 21 matching lines @@
                          content::DownloadItem* item) override;
 
  protected:
   // Platform-specific function to update the platform UI for download progress.
   // |download| is the download item that changed. Implementations should not
   // hold the value of |download| as it is not guaranteed to remain valid.
   // Virtual to be overridable for testing.
   virtual void UpdateAppIconDownloadProgress(content::DownloadItem* download);
 
  private:
-  std::vector<AllDownloadItemNotifier*> notifiers_;
+  std::vector<std::unique_ptr<AllDownloadItemNotifier>> notifiers_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadStatusUpdater);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_