Remount all removable storage devices upon policy update

chrome/browser/chromeos/file_manager/volume_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_VOLUME_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 283 matching lines @@
       chromeos::file_system_provider::MountContext context,
       base::File::Error error) override;
   void OnProvidedFileSystemUnmount(
       const chromeos::file_system_provider::ProvidedFileSystemInfo&
           file_system_info,
       base::File::Error error) override;
 
   // Called on change to kExternalStorageDisabled pref.
   void OnExternalStorageDisabledChanged();
 
+  // Called on change to kExternalStorageReadOnly pref.
+  void OnExternalStorageReadOnlyChanged();
+
   // RemovableStorageObserver overrides.
   void OnRemovableStorageAttached(
       const storage_monitor::StorageInfo& info) override;
   void OnRemovableStorageDetached(
       const storage_monitor::StorageInfo& info) override;
 
   SnapshotManager* snapshot_manager() { return snapshot_manager_.get(); }
 
  private:
   void OnDiskMountManagerRefreshed(bool success);
@@ skipping 18 matching lines @@
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<VolumeManager> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(VolumeManager);
 };
 
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_H_