Improve the device type constants.

chrome/browser/media_gallery/media_device_notifications_linux.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.
 
 // MediaDeviceNotificationsLinux implementation.
 
 #include "chrome/browser/media_gallery/media_device_notifications_linux.h"
 
 #include <libudev.h>
 #include <mntent.h>
@@ skipping 156 matching lines @@
                                      kVendorModelSerialPrefix,
                                      vendor.c_str(),
                                      kNonSpaceDelim,
                                      model.c_str(),
                                      kNonSpaceDelim,
                                      serial_short.c_str());
     } else {
       unique_id = kFSUniqueIdPrefix + unique_id;
     }
     *id = MediaStorageUtil::MakeDeviceId(
-        MediaStorageUtil::USB_MASS_STORAGE_WITH_DCIM, unique_id);
+        MediaStorageUtil::REMOVABLE_MASS_STORAGE_WITH_DCIM, unique_id);
   }
   return true;
 }
 
 }  // namespace
 
 MediaDeviceNotificationsLinux::MediaDeviceNotificationsLinux(
     const FilePath& path)
     : initialized_(false),
       mtab_path_(path),
@@ skipping 194 matching lines @@
 
   SystemMonitor::Get()->ProcessRemovableStorageAttached(id, name, mount_point);
 }
 
 void MediaDeviceNotificationsLinux::RemoveOldDevice(
     const std::string& device_id) {
   SystemMonitor::Get()->ProcessRemovableStorageDetached(device_id);
 }
 
 }  // namespace chrome