fileapi: Rename FileSystemMountProvider to FileSystemBackend

chrome/browser/chromeos/fileapi/cros_mount_point_provider.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_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_
-#define CHROME_BROWSER_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/synchronization/lock.h"
-#include "webkit/browser/fileapi/file_system_mount_point_provider.h"
-#include "webkit/browser/quota/special_storage_policy.h"
-#include "webkit/browser/webkit_storage_browser_export.h"
-#include "webkit/common/fileapi/file_system_types.h"
-
-namespace fileapi {
-class AsyncFileUtilAdapter;
-class CopyOrMoveFileValidatorFactory;
-class ExternalMountPoints;
-class FileSystemFileUtil;
-class FileSystemURL;
-class IsolatedContext;
-}
-
-namespace chromeos {
-
-class CrosMountPointProviderDelegate;
-class FileAccessPermissions;
-
-// CrosMountPointProvider is a Chrome OS specific implementation of
-// ExternalFileSystemMountPointProvider. This class is responsible for a
-// number of things, including:
-//
-// - Add system mount points
-// - Grant/revoke/check file access permissions
-// - Create FileSystemOperation per file system type
-// - Create FileStreamReader/Writer per file system type
-//
-// Chrome OS specific mount points:
-//
-// "Downloads" is a mount point for user's Downloads directory on the local
-// disk, where downloaded files are stored by default.
-//
-// "archive" is a mount point for an archive file, such as a zip file. This
-// mount point exposes contents of an archive file via cros_disks and AVFS
-// <http://avf.sourceforge.net/>.
-//
-// "removable" is a mount point for removable media such as an SD card.
-// Insertion and removal of removable media are handled by cros_disks.
-//
-// "oem" is a read-only mount point for a directory containing OEM data.
-//
-// "drive" is a mount point for Google Drive. Drive is integrated with the
-// FileSystem API layer via drive::FileSystemProxy. This mount point is added
-// by drive::DriveIntegrationService.
-//
-// These mount points are placed under the "external" namespace, and file
-// system URLs for these mount points look like:
-//
-//   filesystem:<origin>/external/<mount_name>/...
-//
-class CrosMountPointProvider
-    : public fileapi::ExternalFileSystemMountPointProvider {
- public:
-  using fileapi::FileSystemMountPointProvider::OpenFileSystemCallback;
-
-  // CrosMountPointProvider will take an ownership of a |mount_points|
-  // reference. On the other hand, |system_mount_points| will be kept as a raw
-  // pointer and it should outlive CrosMountPointProvider instance.
-  // The ownership of |drive_delegate| is also taken.
-  CrosMountPointProvider(
-      CrosMountPointProviderDelegate* drive_delegate,
-      scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy,
-      scoped_refptr<fileapi::ExternalMountPoints> mount_points,
-      fileapi::ExternalMountPoints* system_mount_points);
-  virtual ~CrosMountPointProvider();
-
-  // Adds system mount points, such as "archive", and "removable". This
-  // function is no-op if these mount points are already present.
-  void AddSystemMountPoints();
-
-  // Returns true if CrosMountpointProvider can handle |url|, i.e. its
-  // file system type matches with what this provider supports.
-  // This could be called on any threads.
-  static bool CanHandleURL(const fileapi::FileSystemURL& url);
-
-  // fileapi::FileSystemMountPointProvider overrides.
-  virtual bool CanHandleType(fileapi::FileSystemType type) const OVERRIDE;
-  virtual void OpenFileSystem(
-      const GURL& origin_url,
-      fileapi::FileSystemType type,
-      fileapi::OpenFileSystemMode mode,
-      const OpenFileSystemCallback& callback) OVERRIDE;
-  virtual fileapi::FileSystemFileUtil* GetFileUtil(
-      fileapi::FileSystemType type) OVERRIDE;
-  virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(
-      fileapi::FileSystemType type) OVERRIDE;
-  virtual fileapi::CopyOrMoveFileValidatorFactory*
-      GetCopyOrMoveFileValidatorFactory(
-          fileapi::FileSystemType type,
-          base::PlatformFileError* error_code) OVERRIDE;
-  virtual fileapi::FileSystemOperation* CreateFileSystemOperation(
-      const fileapi::FileSystemURL& url,
-      fileapi::FileSystemContext* context,
-      base::PlatformFileError* error_code) const OVERRIDE;
-  virtual scoped_ptr<webkit_blob::FileStreamReader> CreateFileStreamReader(
-      const fileapi::FileSystemURL& path,
-      int64 offset,
-      const base::Time& expected_modification_time,
-      fileapi::FileSystemContext* context) const OVERRIDE;
-  virtual scoped_ptr<fileapi::FileStreamWriter> CreateFileStreamWriter(
-      const fileapi::FileSystemURL& url,
-      int64 offset,
-      fileapi::FileSystemContext* context) const OVERRIDE;
-  virtual fileapi::FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE;
-
-  // fileapi::ExternalFileSystemMountPointProvider overrides.
-  virtual bool IsAccessAllowed(const fileapi::FileSystemURL& url)
-      const OVERRIDE;
-  virtual std::vector<base::FilePath> GetRootDirectories() const OVERRIDE;
-  virtual void GrantFullAccessToExtension(
-      const std::string& extension_id) OVERRIDE;
-  virtual void GrantFileAccessToExtension(
-      const std::string& extension_id,
-      const base::FilePath& virtual_path) OVERRIDE;
-  virtual void RevokeAccessForExtension(
-      const std::string& extension_id) OVERRIDE;
-  virtual bool GetVirtualPath(const base::FilePath& filesystem_path,
-                              base::FilePath* virtual_path) OVERRIDE;
-
- private:
-  base::FilePath GetFileSystemRootPath(const fileapi::FileSystemURL& url) const;
-
-  scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
-  scoped_ptr<FileAccessPermissions> file_access_permissions_;
-  scoped_ptr<fileapi::AsyncFileUtilAdapter> local_file_util_;
-
-  // The Delegate instance for the drive file system related operation.
-  scoped_ptr<CrosMountPointProviderDelegate> drive_delegate_;
-
-  // Mount points specific to the owning context (i.e. per-profile mount
-  // points).
-  //
-  // It is legal to have mount points with the same name as in
-  // system_mount_points_. Also, mount point paths may overlap with mount point
-  // paths in system_mount_points_. In both cases mount points in
-  // |mount_points_| will have a priority.
-  // E.g. if |mount_points_| map 'foo1' to '/foo/foo1' and
-  // |file_system_mount_points_| map 'xxx' to '/foo/foo1/xxx', |GetVirtualPaths|
-  // will resolve '/foo/foo1/xxx/yyy' as 'foo1/xxx/yyy' (i.e. the mapping from
-  // |mount_points_| will be used).
-  scoped_refptr<fileapi::ExternalMountPoints> mount_points_;
-
-  // Globally visible mount points. System MountPonts instance should outlive
-  // all CrosMountPointProvider instances, so raw pointer is safe.
-  fileapi::ExternalMountPoints* system_mount_points_;
-
-  DISALLOW_COPY_AND_ASSIGN(CrosMountPointProvider);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_