Switch SupportsUserData uses to use unique_ptr.

chrome/browser/extensions/api/downloads/downloads_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/downloads/downloads_api.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <memory>
 #include <set>
@@ skipping 602 matching lines @@
   explicit ExtensionDownloadsEventRouterData(
       DownloadItem* download_item,
       std::unique_ptr<base::DictionaryValue> json_item)
       : updated_(0),
         changed_fired_(0),
         json_(std::move(json_item)),
         creator_conflict_action_(downloads::FILENAME_CONFLICT_ACTION_UNIQUIFY),
         determined_conflict_action_(
             downloads::FILENAME_CONFLICT_ACTION_UNIQUIFY) {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
-    download_item->SetUserData(kKey, this);
+    download_item->SetUserData(kKey, base::WrapUnique(this));
   }
 
   ~ExtensionDownloadsEventRouterData() override {
     if (updated_ > 0) {
       UMA_HISTOGRAM_PERCENTAGE("Download.OnChanged",
                                (changed_fired_ * 100 / updated_));
     }
   }
 
   const base::DictionaryValue& json() const { return *json_; }
@@ skipping 313 matching lines @@
   return (data == NULL) ? NULL :
       static_cast<DownloadedByExtension*>(data);
 }
 
 DownloadedByExtension::DownloadedByExtension(
     content::DownloadItem* item,
     const std::string& id,
     const std::string& name)
   : id_(id),
     name_(name) {
-  item->SetUserData(kKey, this);
+  item->SetUserData(kKey, base::WrapUnique(this));
 }
 
 DownloadsDownloadFunction::DownloadsDownloadFunction() {}
 
 DownloadsDownloadFunction::~DownloadsDownloadFunction() {}
 
 bool DownloadsDownloadFunction::RunAsync() {
   std::unique_ptr<downloads::Download::Params> params(
       downloads::Download::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
@@ skipping 955 matching lines @@
     return;
   base::Time now(base::Time::Now());
   int delta = now.ToTimeT() - last_checked_removal_.ToTimeT();
   if (delta <= kFileExistenceRateLimitSeconds)
     return;
   last_checked_removal_ = now;
   manager->CheckForHistoryFilesRemoval();
 }
 
 }  // namespace extensions