Require explicit selection of traits for LazyInstance

chrome/browser/media_galleries/fileapi/mtp_device_map_service.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/media_galleries/fileapi/mtp_device_map_service.h"
 
 #include <string>
 #include <utility>
 
 #include "base/stl_util.h"
 #include "chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h"
 #include "content/public/browser/browser_thread.h"
 #include "storage/browser/fileapi/external_mount_points.h"
 
 namespace {
 
-base::LazyInstance<MTPDeviceMapService> g_mtp_device_map_service =
-    LAZY_INSTANCE_INITIALIZER;
+base::LazyInstance<MTPDeviceMapService>::DestructorAtExit
+    g_mtp_device_map_service = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 // static
 MTPDeviceMapService* MTPDeviceMapService::GetInstance() {
   return g_mtp_device_map_service.Pointer();
 }
 
 void MTPDeviceMapService::RegisterMTPFileSystem(
     const base::FilePath::StringType& device_location,
@@ skipping 115 matching lines @@
              ? async_delegate_map_it->second
              : NULL;
 }
 
 MTPDeviceMapService::MTPDeviceMapService() {
 }
 
 MTPDeviceMapService::~MTPDeviceMapService() {
   DCHECK(mtp_device_usage_map_.empty());
 }