Add a method in DiskMountManager to refresh mount entries in addition to devices.

chrome/browser/chromeos/file_manager/fake_disk_mount_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/fake_disk_mount_manager.h"
 
+#include "base/callback.h"
 #include "base/stl_util.h"
 
 namespace file_manager {
 
 FakeDiskMountManager::MountRequest::MountRequest(
     const std::string& source_path,
     const std::string& source_format,
     const std::string& mount_label,
     chromeos::MountType type)
     : source_path(source_path),
@@ skipping 38 matching lines @@
   if (iter == disks_.end())
     return NULL;
   return iter->second;
 }
 
 const chromeos::disks::DiskMountManager::MountPointMap&
 FakeDiskMountManager::mount_points() const {
   return mount_points_;
 }
 
-void FakeDiskMountManager::RequestMountInfoRefresh() {
+void FakeDiskMountManager::EnsureMountInfoRefreshed(
+    const EnsureMountInfoRefreshedCallback& callback) {
+  callback.Run(true);
 }
 
 void FakeDiskMountManager::MountPath(const std::string& source_path,
                                      const std::string& source_format,
                                      const std::string& mount_label,
                                      chromeos::MountType type) {
   mount_requests_.push_back(
       MountRequest(source_path, source_format, mount_label, type));
 
   const MountPointInfo mount_point(
@@ skipping 45 matching lines @@
 
 void FakeDiskMountManager::InvokeDiskEventForTest(
     chromeos::disks::DiskMountManager::DiskEvent event,
     const chromeos::disks::DiskMountManager::Disk* disk) {
   FOR_EACH_OBSERVER(chromeos::disks::DiskMountManager::Observer,
                     observers_,
                     OnDiskEvent(event, disk));
 }
 
 }  // namespace file_manager