Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/webstore_installer_test.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_TEST_H_
 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_TEST_H_
 
 #include <string>
 
 #include "base/files/scoped_temp_dir.h"
@@ skipping 53 matching lines @@
 
   std::string webstore_domain_;
   std::string test_data_path_;
   std::string crx_filename_;
   std::string verified_domain_;
   std::string unverified_domain_;
   std::string test_gallery_url_;
 
   base::ScopedTempDir download_directory_;
 
-  scoped_ptr<extensions::ScopedTestDialogAutoConfirm> install_auto_confirm_;
+  std::unique_ptr<extensions::ScopedTestDialogAutoConfirm>
+      install_auto_confirm_;
 
   DISALLOW_COPY_AND_ASSIGN(WebstoreInstallerTest);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_TEST_H_