Improve the device type constants.

chrome/browser/media_gallery/media_file_system_registry.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.
 
 // MediaFileSystemRegistry implementation.
 
 #include "chrome/browser/media_gallery/media_file_system_registry.h"
 
 #include <set>
 
@@ skipping 77 matching lines @@
   }
 
   // TODO(thestig) Handle overlap between devices and media directories.
   SystemMonitor* monitor = SystemMonitor::Get();
   const std::vector<SystemMonitor::RemovableStorageInfo> media_devices =
       monitor->GetAttachedRemovableStorage();
   for (size_t i = 0; i < media_devices.size(); ++i) {
     MediaStorageUtil::Type type;
     MediaStorageUtil::CrackDeviceId(media_devices[i].device_id, &type, NULL);
     // TODO(vandebo) Handle MTP devices.
-    if (type != MediaStorageUtil::USB_MTP &&
+    if (type != MediaStorageUtil::MTP_OR_PTP &&
         IsGalleryPermittedForExtension(extension, media_devices[i].location)) {
       device_id_map_.insert(std::make_pair(media_devices[i].device_id,
                                            media_devices[i]));
       FilePath path(media_devices[i].location);
       const std::string fsid = RegisterPathAsFileSystem(path);
       child_it->second.insert(std::make_pair(path, fsid));
     }
   }
 
   MediaPathToFSIDMap& child_map = child_it->second;
@@ skipping 110 matching lines @@
     MediaPathToFSIDMap& child_map = child_it->second;
     MediaPathToFSIDMap::iterator media_path_it = child_map.find(path);
     if (media_path_it == child_map.end())
       continue;
 
     child_map.erase(media_path_it);
   }
 }
 
 }  // namespace chrome