Isolated FS for media devices.

webkit/fileapi/media/media_device_interface.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 WEBKIT_FILEAPI_MEDIA_MEDIA_DEVICE_INTERFACE_H_
+#define WEBKIT_FILEAPI_MEDIA_MEDIA_DEVICE_INTERFACE_H_
+
+#include "base/file_path.h"
+#include "base/platform_file.h"
+#include "base/timer.h"
+#include "webkit/fileapi/file_system_file_util.h"
+
+namespace base {
+struct PlatformFileInfo;
+class Time;
+}
+
+namespace fileapi {
+
+using base::PlatformFileError;
+using base::PlatformFileInfo;
+using base::Time;
+
+// Helper interface to support media device isolated file system operations.
+class MediaDeviceInterface {
+ public:
+  virtual PlatformFileError GetFileInfo(const FilePath& file_path,
+                                        PlatformFileInfo* file_info) = 0;
+  virtual FileSystemFileUtil::AbstractFileEnumerator* CreateFileEnumerator(
+      const FilePath& root,
+      bool recursive) = 0;
+  virtual PlatformFileError Touch(const FilePath& file_path,
+                                  const Time& last_access_time,
+                                  const Time& last_modified_time) = 0;
+  virtual bool PathExists(const FilePath& file_path) = 0;
+  virtual bool DirectoryExists(const FilePath& file_path) = 0;
+  virtual bool IsDirectoryEmpty(const FilePath& file_path) = 0;
+  virtual bool CreateSnapshotFile(const FilePath& device_file_path,

[kinuko, 2012/07/30 23:19:03]

Since this could fail for various reasons maybe we should return
PlatformFileError rather than bool for this one?

[kmadhusu, 2012/07/31 01:17:48]

Done

+                                  const FilePath& local_path,
+                                  PlatformFileInfo* file_info) = 0;
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_MEDIA_MEDIA_DEVICE_INTERFACE_H_