Gender-neutralize a few more comments / strings.

chrome/browser/chromeos/file_manager/volume_manager.cc

 // Copyright 2013 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/chromeos/file_manager/volume_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 658 matching lines @@
   const chromeos::MountError mount_error = error == base::File::FILE_OK
                                                ? chromeos::MOUNT_ERROR_NONE
                                                : chromeos::MOUNT_ERROR_UNKNOWN;
   linked_ptr<Volume> volume(Volume::CreateForProvidedFileSystem(
       file_system_info, MOUNT_CONTEXT_UNKNOWN));
   DoUnmountEvent(mount_error, volume);
 }
 
 void VolumeManager::OnExternalStorageDisabledChanged() {
   // If the policy just got disabled we have to unmount every device currently
-  // mounted. The opposite is fine - we can let the user re-plug her device to
+  // mounted. The opposite is fine - we can let the user re-plug their device to
   // make it available.
   if (profile_->GetPrefs()->GetBoolean(prefs::kExternalStorageDisabled)) {
     // We do not iterate on mount_points directly, because mount_points can
     // be changed by UnmountPath().
     // TODO(hidehiko): Is it necessary to unmount mounted archives, too, here?
     while (!disk_mount_manager_->mount_points().empty()) {
       std::string mount_path =
           disk_mount_manager_->mount_points().begin()->second.mount_path;
       disk_mount_manager_->UnmountPath(
           mount_path,
@@ skipping 185 matching lines @@
   if (mounted_volumes_.find(volume->volume_id()) == mounted_volumes_.end())
     return;
   if (error_code == chromeos::MOUNT_ERROR_NONE)
     mounted_volumes_.erase(volume->volume_id());
 
   FOR_EACH_OBSERVER(VolumeManagerObserver, observers_,
                     OnVolumeUnmounted(error_code, *volume.get()));
 }
 
 }  // namespace file_manager