[fsp] Add requestUnmount() method together with the request manager.

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 <string>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
 #include "chrome/browser/chromeos/file_system_provider/observer.h"
 #include "chrome/browser/chromeos/file_system_provider/service.h"
 #include "chrome/browser/local_discovery/storage/privet_volume_lister.h"
 #include "chromeos/dbus/cros_disks_client.h"
 #include "chromeos/disks/disk_mount_manager.h"
@@ skipping 27 matching lines @@
   VOLUME_TYPE_MOUNTED_ARCHIVE_FILE,
   VOLUME_TYPE_CLOUD_DEVICE,
   VOLUME_TYPE_PROVIDED,
   VOLUME_TYPE_TESTING
 };
 
 struct VolumeInfo {
   VolumeInfo();
   ~VolumeInfo();
 
+  // The ID for provided file system. If other type, then undefined.
+  int file_system_id;
+
   // The ID of the volume.
   std::string volume_id;
 
   // The type of mounted volume.
   VolumeType type;
 
   // The type of device. (e.g. USB, SD card, DVD etc.)
   chromeos::DeviceType device_type;
 
   // The source path of the volume.
@@ skipping 93 matching lines @@
       chromeos::disks::DiskMountManager::MountEvent event,
       chromeos::MountError error_code,
       const chromeos::disks::DiskMountManager::MountPointInfo& mount_info)
       OVERRIDE;
   virtual void OnFormatEvent(
       chromeos::disks::DiskMountManager::FormatEvent event,
       chromeos::FormatError error_code,
       const std::string& device_path) OVERRIDE;
 
   // chromeos::file_system_provider::Observer overrides.
-  virtual void OnProvidedFileSystemRegistered(
-      const chromeos::file_system_provider::ProvidedFileSystem& file_system)
-      OVERRIDE;
-  virtual void OnProvidedFileSystemUnregistered(
-      const chromeos::file_system_provider::ProvidedFileSystem& file_system)
-      OVERRIDE;
+  virtual void OnProvidedFileSystemMount(
+      const chromeos::file_system_provider::ProvidedFileSystem& file_system,
+      base::File::Error error) OVERRIDE;
+  virtual void OnProvidedFileSystemUnmount(
+      const chromeos::file_system_provider::ProvidedFileSystem& file_system,
+      base::File::Error error) OVERRIDE;
 
   // Called on change to kExternalStorageDisabled pref.
   void OnExternalStorageDisabledChanged();
 
  private:
   void OnPrivetVolumesAvailable(
       const local_discovery::PrivetVolumeLister::VolumeList& volumes);
   void DoMountEvent(chromeos::MountError error_code,
                     const VolumeInfo& volume_info,
                     bool is_remounting);
@@ skipping 10 matching lines @@
   chromeos::file_system_provider::Service* file_system_provider_service_;
 
   std::map<std::string, VolumeInfo> mounted_volumes_;
 
   DISALLOW_COPY_AND_ASSIGN(VolumeManager);
 };
 
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_H_