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

chrome/browser/extensions/api/developer_private/show_permissions_dialog_helper.cc

 // Copyright 2015 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/extensions/api/developer_private/show_permissions_dialog_helper.h"
 
 #include <utility>
 
 #include "apps/app_load_service.h"
 #include "apps/saved_files_service.h"
@@ skipping 60 matching lines @@
             ->GetAllFileEntries(extension_id_);
     for (const apps::SavedFileEntry& entry : retained_file_entries)
       retained_file_paths.push_back(entry.path);
   }
   std::vector<base::string16> retained_device_messages;
   if (extension->permissions_data()->HasAPIPermission(APIPermission::kUsb)) {
     retained_device_messages =
         DevicePermissionsManager::Get(profile_)
             ->GetPermissionMessageStrings(extension_id_);
   }
-  scoped_ptr<ExtensionInstallPrompt::Prompt> prompt(
+  std::unique_ptr<ExtensionInstallPrompt::Prompt> prompt(
       new ExtensionInstallPrompt::Prompt(
           ExtensionInstallPrompt::POST_INSTALL_PERMISSIONS_PROMPT));
   prompt->set_retained_files(retained_file_paths);
   prompt->set_retained_device_messages(retained_device_messages);
   // Unretained() is safe because this class manages its own lifetime and
   // deletes itself in OnInstallPromptDone().
   prompt_->ShowDialog(
       base::Bind(&ShowPermissionsDialogHelper::OnInstallPromptDone,
                  base::Unretained(this)),
       extension, nullptr, std::move(prompt),
@@ skipping 12 matching lines @@
       apps::SavedFilesService::Get(profile_)->ClearQueue(extension);
     apps::AppLoadService::Get(profile_)
         ->RestartApplicationIfRunning(extension_id_);
   }
 
   on_complete_.Run();
   delete this;
 }
 
 }  // namespace extensions