Refine StorageMonitor storage device getter

chrome/browser/storage_monitor/volume_mount_watcher_win.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.
 
 #ifndef CHROME_BROWSER_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 40 matching lines @@
   // notification if appropriate.
   void OnWindowMessage(UINT event_type, LPARAM data);
 
   // Set the volume notifications object to be used when new
   // removable volumes are found.
   void SetNotifications(StorageMonitor::Receiver* notifications);
 
   void EjectDevice(const std::string& device_id,
                    base::Callback<void(StorageMonitor::EjectStatus)> callback);
 
+  std::vector<StorageInfo> GetAllVolumeStorages() const;
+
  protected:
   typedef base::Callback<bool(const base::FilePath&,
                               StorageInfo*)> GetDeviceDetailsCallbackType;
 
   typedef base::Callback<std::vector<base::FilePath>(void)>
       GetAttachedDevicesCallbackType;
 
   // Handles mass storage device attach event on UI thread.
   void HandleDeviceAttachEventOnUIThread(
       const base::FilePath& device_path,
@@ skipping 45 matching lines @@
   // The notifications object to use to signal newly attached volumes. Only
   // removable devices will be notified.
   StorageMonitor::Receiver* notifications_;
 
   DISALLOW_COPY_AND_ASSIGN(VolumeMountWatcherWin);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_