chromeos: Add out-of-line copy ctors for complex classes.

chromeos/disks/disk_mount_manager.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 "chromeos/disks/disk_mount_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 665 matching lines @@
       system_path_prefix_(system_path_prefix),
       device_type_(device_type),
       total_size_in_bytes_(total_size_in_bytes),
       is_parent_(is_parent),
       is_read_only_(is_read_only),
       has_media_(has_media),
       on_boot_device_(on_boot_device),
       on_removable_device_(on_removable_device),
       is_hidden_(is_hidden) {}
 
+DiskMountManager::Disk::Disk(const Disk& other) = default;
+
 DiskMountManager::Disk::~Disk() {}
 
 bool DiskMountManager::AddDiskForTest(Disk* disk) {
   return false;
 }
 
 bool DiskMountManager::AddMountPointForTest(const MountPointInfo& mount_point) {
   return false;
 }
 
@@ skipping 60 matching lines @@
   VLOG(1) << "DiskMountManager Shutdown completed";
 }
 
 // static
 DiskMountManager* DiskMountManager::GetInstance() {
   return g_disk_mount_manager;
 }
 
 }  // namespace disks
 }  // namespace chromeos