Refine StorageMonitor storage device getter

chrome/browser/storage_monitor/storage_monitor_mac.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_STORAGE_MONITOR_MAC_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_STORAGE_MONITOR_MAC_H_
 
 #include <DiskArbitration/DiskArbitration.h>
 #include <map>
 
@@ skipping 28 matching lines @@
                   UpdateType update_type);
 
   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 std::vector<StorageInfo> GetAllAvailableStorages() const OVERRIDE;
+
  private:
   static void DiskAppearedCallback(DADiskRef disk, void* context);
   static void DiskDisappearedCallback(DADiskRef disk, void* context);
   static void DiskDescriptionChangedCallback(DADiskRef disk,
                                              CFArrayRef keys,
                                              void *context);
   void GetDiskInfoAndUpdate(DADiskRef disk, UpdateType update_type);
 
   bool ShouldPostNotificationForDisk(const StorageInfo& info) const;
   bool FindDiskWithMountPoint(const base::FilePath& mount_point,
                               StorageInfo* info) const;
 
   base::mac::ScopedCFTypeRef<DASessionRef> session_;
   // Maps disk bsd names to disk info objects. This map tracks all mountable
   // devices on the system, though only notifications for removable devices are
   // posted.
   std::map<std::string, StorageInfo> disk_info_map_;
 
   int pending_disk_updates_;
 
   scoped_ptr<chrome::ImageCaptureDeviceManager> image_capture_device_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(StorageMonitorMac);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_STORAGE_MONITOR_MAC_H_