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

chrome/browser/media_gallery/media_device_notifications_chromeos.h

 // 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 listens for mount point changes and
 // notifies the SystemMonitor about the addition and deletion of media devices.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
 #define CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
 
@@ skipping 29 matching lines @@
 
  private:
   friend class base::RefCountedThreadSafe<MediaDeviceNotifications>;
 
   // Mapping of mount points to mount device IDs.
   typedef std::map<std::string, std::string> MountMap;
 
   // Private to avoid code deleting the object.
   virtual ~MediaDeviceNotifications();
 
+  // Checks existing mount points map for media devices.
+  void CheckExistingMountPoints();

[Lei Zhang, 2012/08/03 06:24:19]

How about:
// Checks existing mount points map for media devices. For each mount point,
call CheckMountedPathOnFileThread() below.
void CheckExistingMountPointsOnUIThread();

and add a DCHECK() in the impl.

[kmadhusu, 2012/08/03 06:37:02]

Done.

+
   // Checks if the mount point in |mount_info| is a media device. If it is,
   // then continue with AddMountedPathOnUIThread() below.
   void CheckMountedPathOnFileThread(
       const disks::DiskMountManager::MountPointInfo& mount_info);
 
   // Adds the mount point in |mount_info| to |mount_map_| and send a media
   // device attach notification.
   void AddMountedPathOnUIThread(
       const disks::DiskMountManager::MountPointInfo& mount_info);
 
   // Mapping of relevant mount points and their corresponding mount devices.
   // Only accessed on the UI thread.
   MountMap mount_map_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaDeviceNotifications);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_