[SystemInfo API] Rewrite storage info provider using storage monitor impl

chrome/browser/storage_monitor/storage_monitor_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::StorageMonitorCros listens for mount point changes and notifies
 // listeners about the addition and deletion of media devices.
 // This class lives on the UI thread.
 
 #ifndef CHROME_BROWSER_STORAGE_MONITOR_STORAGE_MONITOR_CHROMEOS_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_STORAGE_MONITOR_CHROMEOS_H_
@@ skipping 49 matching lines @@
 
   // StorageMonitor implementation.
   virtual bool GetStorageInfoForPath(
       const base::FilePath& path,
       chrome::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;
+  virtual std::vector<chrome::StorageInfo>
+      GetAllAvailableStorages() const OVERRIDE;
 
  private:
   // Mapping of mount path to removable mass storage info.
   typedef std::map<std::string, chrome::StorageInfo> MountMap;
 
   // Helper method that checks existing mount points to see if they are media
   // devices. Eventually calls AddMountedPath for all mount points.
   void CheckExistingMountPoints();
 
   // Adds the mount point in |mount_info| to |mount_map_| and send a media
@@ skipping 11 matching lines @@
       media_transfer_protocol_device_observer_;
 
   base::WeakPtrFactory<StorageMonitorCros> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(StorageMonitorCros);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_STORAGE_MONITOR_CHROMEOS_H_