Refine StorageMonitor storage device getter

chrome/browser/storage_monitor/storage_monitor_linux.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.
 
 // StorageMonitorLinux processes mount point change events, notifies listeners
 // about the addition and deletion of media devices, and answers queries about
 // mounted devices.
 // StorageMonitorLinux lives on the UI thread, and uses a MtabWatcherLinux on
 // the FILE thread to get mount point change events.
 
@@ skipping 72 matching lines @@
   // For devices that are mounted to multiple mount points, this helps us track
   // which one we've notified system monitor about.
   typedef std::map<base::FilePath, bool> ReferencedMountPoint;
 
   // (mount device, map of known mount points)
   // For each mount device, track the places it is mounted and which one (if
   // any) we have notified system monitor about.
   typedef std::map<base::FilePath, ReferencedMountPoint> MountPriorityMap;
 
   // StorageMonitor implementation.
+  virtual std::vector<StorageInfo> GetAllAvailableStorages() const OVERRIDE;
   virtual bool GetStorageInfoForPath(const base::FilePath& path,
                                      StorageInfo* device_info) const OVERRIDE;
   virtual void EjectDevice(const std::string& device_id,
                            base::Callback<void(EjectStatus)> callback) OVERRIDE;
   virtual device::MediaTransferProtocolManager*
       media_transfer_protocol_manager() OVERRIDE;
 
   // Called when the MtabWatcher has been created.
   void OnMtabWatcherCreated(MtabWatcherLinux* watcher);
 
@@ skipping 34 matching lines @@
   scoped_ptr<MtabWatcherLinux, MtabWatcherLinuxDeleter> mtab_watcher_;
 
   base::WeakPtrFactory<StorageMonitorLinux> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(StorageMonitorLinux);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_STORAGE_MONITOR_LINUX_H_