Remove some linked_ptr c/b/extension

chrome/browser/extensions/api/storage/sync_storage_backend.cc

 // Copyright 2014 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/storage/sync_storage_backend.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 71 matching lines @@
   }
 
   std::unique_ptr<SettingsStorageQuotaEnforcer> storage(
       new SettingsStorageQuotaEnforcer(
           quota_, storage_factory_->CreateSettingsStore(
                       settings_namespace::SYNC, ToFactoryModelType(sync_type_),
                       extension_id)));
 
   // It's fine to create the quota enforcer underneath the sync layer, since
   // sync will only go ahead if each underlying storage operation succeeds.
-  linked_ptr<SyncableSettingsStorage> syncable_storage(
-      new SyncableSettingsStorage(
-          observers_, extension_id, storage.release(), sync_type_, flare_));
-  storage_objs_[extension_id] = syncable_storage;
+  storage_objs_[extension_id] = base::MakeUnique<SyncableSettingsStorage>(
+      observers_, extension_id, storage.release(), sync_type_, flare_);
+  SyncableSettingsStorage* syncable_storage = storage_objs_[extension_id].get();

[Devlin, 2016/11/02 22:25:33]

similar comment here around saving a lookup

[limasdf, 2016/11/03 15:29:23]

Done.

 
   if (sync_processor_.get()) {
     syncer::SyncError error = syncable_storage->StartSyncing(
         std::move(sync_data), CreateSettingsSyncProcessor(extension_id));
     if (error.IsSet())
       syncable_storage->StopSyncing();
   }
-  return syncable_storage.get();
+  return syncable_storage;
 }
 
 void SyncStorageBackend::DeleteStorage(const std::string& extension_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 
   // Clear settings when the extension is uninstalled.  Leveldb implementations
   // will also delete the database from disk when the object is destroyed as a
   // result of being removed from |storage_objs_|.
   //
   // TODO(kalman): always GetStorage here (rather than only clearing if it
@@ skipping 161 matching lines @@
 
 std::unique_ptr<SettingsSyncProcessor>
 SyncStorageBackend::CreateSettingsSyncProcessor(
     const std::string& extension_id) const {
   CHECK(sync_processor_.get());
   return std::unique_ptr<SettingsSyncProcessor>(new SettingsSyncProcessor(
       extension_id, sync_type_, sync_processor_.get()));
 }
 
 }  // namespace extensions