Switch SupportsUserData uses to use unique_ptr.

components/history/core/browser/history_backend.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 "components/history/core/browser/history_backend.h"
 
 #include <algorithm>
 #include <functional>
 #include <list>
 #include <map>
@@ skipping 2466 matching lines @@
   db_->BeginTransaction();
   CloseAllDatabases();
 }
 
 base::SupportsUserData::Data* HistoryBackend::GetUserData(
     const void* key) const {
   DCHECK(supports_user_data_helper_);
   return supports_user_data_helper_->GetUserData(key);
 }
 
-void HistoryBackend::SetUserData(const void* key,
-                                 base::SupportsUserData::Data* data) {
+void HistoryBackend::SetUserData(
+    const void* key,
+    std::unique_ptr<base::SupportsUserData::Data> data) {
   DCHECK(supports_user_data_helper_);
-  supports_user_data_helper_->SetUserData(key, data);
+  supports_user_data_helper_->SetUserData(key, std::move(data));
 }
 
 void HistoryBackend::ProcessDBTask(
     std::unique_ptr<HistoryDBTask> task,
     scoped_refptr<base::SingleThreadTaskRunner> origin_loop,
     const base::CancelableTaskTracker::IsCanceledCallback& is_canceled) {
   bool scheduled = !queued_history_db_tasks_.empty();
   queued_history_db_tasks_.push_back(base::MakeUnique<QueuedHistoryDBTask>(
       std::move(task), origin_loop, is_canceled));
   if (!scheduled)
@@ skipping 159 matching lines @@
   // transaction is currently open.
   db_->CommitTransaction();
   db_->Vacuum();
   db_->BeginTransaction();
   db_->GetStartDate(&first_recorded_time_);
 
   return true;
 }
 
 }  // namespace history