Use a vector of smart pointers for callback return type.

chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc

 // Copyright 2016 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/ui/webui/offline/offline_internals_ui_message_handler.h"
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <vector>
 
@@ skipping 100 matching lines @@
     offline_page->SetDouble("lastAccessTime", page.last_access_time.ToJsTime());
     offline_page->SetInteger("accessCount", page.access_count);
     offline_page->SetString("isExpired", page.IsExpired() ? "Yes" : "No");
   }
   ResolveJavascriptCallback(base::StringValue(callback_id), results);
 }
 
 void OfflineInternalsUIMessageHandler::HandleRequestQueueCallback(
     std::string callback_id,
     offline_pages::RequestQueue::GetRequestsResult result,
-    const std::vector<offline_pages::SavePageRequest>& requests) {
+    std::vector<std::unique_ptr<offline_pages::SavePageRequest>> requests) {
   base::ListValue save_page_requests;
   if (result == offline_pages::RequestQueue::GetRequestsResult::SUCCESS) {
     for (const auto& request : requests) {
       base::DictionaryValue* save_page_request = new base::DictionaryValue();
       save_page_requests.Append(save_page_request);
       save_page_request->SetString("onlineUrl", request.url().spec());
       save_page_request->SetDouble("creationTime",
                                    request.creation_time().ToJsTime());
       save_page_request->SetString("status", GetStringFromSavePageStatus());
       save_page_request->SetString("namespace", request.client_id().name_space);
@@ skipping 158 matching lines @@
 
   // Get the offline page model associated with this web ui.
   Profile* profile = Profile::FromWebUI(web_ui());
   offline_page_model_ =
       offline_pages::OfflinePageModelFactory::GetForBrowserContext(profile);
   request_coordinator_ =
       offline_pages::RequestCoordinatorFactory::GetForBrowserContext(profile);
 }
 
 }  // namespace offline_internals