Add a method in DiskMountManager to refresh mount entries in addition to devices.

chrome/browser/chromeos/file_manager/fake_disk_mount_manager.h

 // Copyright 2013 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_CHROMEOS_FILE_MANAGER_FAKE_DISK_MOUNT_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FAKE_DISK_MOUNT_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 37 matching lines @@
     return unmount_requests_;
   }
 
   // DiskMountManager overrides.
   virtual void AddObserver(Observer* observer) OVERRIDE;
   virtual void RemoveObserver(Observer* observer) OVERRIDE;
   virtual const DiskMap& disks() const OVERRIDE;
   virtual const Disk* FindDiskBySourcePath(
       const std::string& source_path) const OVERRIDE;
   virtual const MountPointMap& mount_points() const OVERRIDE;
-  virtual void RequestMountInfoRefresh() OVERRIDE;
+  virtual void EnsureMountInfoRefreshed(
+      const EnsureMountInfoRefreshedCallback& callback) OVERRIDE;
   virtual void MountPath(const std::string& source_path,
                          const std::string& source_format,
                          const std::string& mount_label,
                          chromeos::MountType type) OVERRIDE;
   virtual void UnmountPath(const std::string& mount_path,
                            chromeos::UnmountOptions options,
                            const UnmountPathCallback& callback) OVERRIDE;
   virtual void FormatMountedDevice(const std::string& mount_path) OVERRIDE;
   virtual void UnmountDeviceRecursively(
       const std::string& device_path,
@@ skipping 12 matching lines @@
 
   std::vector<MountRequest> mount_requests_;
   std::vector<UnmountRequest> unmount_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeDiskMountManager);
 };
 
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FAKE_DISK_MOUNT_MANAGER_H_