Add a method to remount all removable devices in DiskMountManager.

chrome/browser/chromeos/extensions/file_manager/device_event_router.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 "base/bind.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/extensions/file_manager/device_event_router.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager.h"
 #include "content/public/browser/browser_thread.h"
 
@@ skipping 60 matching lines @@
 }
 
 void DeviceEventRouter::OnDiskRemoved(
     const chromeos::disks::DiskMountManager::Disk& disk) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (is_resuming_ || is_starting_up_)
     return;
 
   const std::string& device_path = disk.system_path_prefix();
-  if (!disk.is_read_only() && !disk.mount_path().empty() &&
+  if (!disk.is_read_only() && disk.is_mounted() &&
       GetDeviceState(device_path) != DEVICE_HARD_UNPLUGGED_AND_REPORTED) {
     OnDeviceEvent(file_manager_private::DEVICE_EVENT_TYPE_HARD_UNPLUGGED,
                   device_path);
     SetDeviceState(device_path, DEVICE_HARD_UNPLUGGED_AND_REPORTED);
   }
 }
 
 void DeviceEventRouter::OnVolumeMounted(chromeos::MountError error_code,
                                         const Volume& volume) {
   DCHECK(thread_checker_.CalledOnValidThread());
@@ skipping 61 matching lines @@
     device_states_[device_path] = state;
   } else {
     const std::map<std::string, DeviceState>::iterator it =
         device_states_.find(device_path);
     if (it != device_states_.end())
       device_states_.erase(it);
   }
 }
 
 }  // namespace file_manager