Switch SupportsUserData uses to use unique_ptr.

chrome/browser/safe_browsing/download_feedback_service.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/safe_browsing/download_feedback_service.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/supports_user_data.h"
 #include "base/task_runner.h"
 #include "chrome/browser/safe_browsing/download_feedback.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_item.h"
 
 namespace safe_browsing {
 
 namespace {
@@ skipping 33 matching lines @@
                                              const std::string& ping_response)
     : ping_request_(ping_request),
       ping_response_(ping_response) {
 }
 
 // static
 void DownloadFeedbackPings::CreateForDownload(
     content::DownloadItem* download,
     const std::string& ping_request,
     const std::string& ping_response) {
-  DownloadFeedbackPings* pings = new DownloadFeedbackPings(ping_request,
-                                                           ping_response);
-  download->SetUserData(kPingKey, pings);
+  download->SetUserData(kPingKey, base::MakeUnique<DownloadFeedbackPings>(
+                                      ping_request, ping_response));
 }
 
 // static
 DownloadFeedbackPings* DownloadFeedbackPings::FromDownload(
     const content::DownloadItem& download) {
   return static_cast<DownloadFeedbackPings*>(download.GetUserData(kPingKey));
 }
 
 }  // namespace
 
@@ skipping 127 matching lines @@
 void DownloadFeedbackService::FeedbackComplete() {
   DVLOG(1) << __func__;
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK(!active_feedback_.empty());
   active_feedback_.pop();
   if (!active_feedback_.empty())
     StartPendingFeedback();
 }
 
 }  // namespace safe_browsing