Revert 149812 - [CrOS] Enumerate existing mount points and check for media devices.

chrome/browser/media_gallery/media_device_notifications_chromeos.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.
 
 // chromeos::MediaDeviceNotifications implementation.
 
 #include "chrome/browser/media_gallery/media_device_notifications_chromeos.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
@@ skipping 28 matching lines @@
   return true;
 }
 
 }  // namespace
 
 using content::BrowserThread;
 
 MediaDeviceNotifications::MediaDeviceNotifications() {
   DCHECK(disks::DiskMountManager::GetInstance());
   disks::DiskMountManager::GetInstance()->AddObserver(this);
-  CheckExistingMountPointsOnUIThread();
 }
 
 MediaDeviceNotifications::~MediaDeviceNotifications() {
   disks::DiskMountManager* manager = disks::DiskMountManager::GetInstance();
   if (manager) {
     manager->RemoveObserver(this);
   }
 }
 
-void MediaDeviceNotifications::CheckExistingMountPointsOnUIThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  const disks::DiskMountManager::MountPointMap& mount_point_map =
-      disks::DiskMountManager::GetInstance()->mount_points();
-  for (disks::DiskMountManager::MountPointMap::const_iterator it =
-           mount_point_map.begin(); it != mount_point_map.end(); ++it) {
-    BrowserThread::PostTask(
-        BrowserThread::FILE, FROM_HERE,
-        base::Bind(&MediaDeviceNotifications::CheckMountedPathOnFileThread,
-                   this, it->second));
-  }
-}
-
 void MediaDeviceNotifications::DiskChanged(
     disks::DiskMountManagerEventType event,
     const disks::DiskMountManager::Disk* disk) {
 }
 
 void MediaDeviceNotifications::DeviceChanged(
     disks::DiskMountManagerEventType event,
     const std::string& device_path) {
 }
 
@@ skipping 72 matching lines @@
 
   mount_map_.insert(std::make_pair(mount_info.mount_path, device_id));
   base::SystemMonitor::Get()->ProcessMediaDeviceAttached(
       device_id,
       device_label,
       base::SystemMonitor::TYPE_PATH,
       mount_info.mount_path);
 }
 
 }  // namespace chrome