Isolated FS for media devices.

webkit/fileapi/mtp_device_interface_linux.h

Index: webkit/fileapi/mtp_device_interface_linux.h
diff --git a/webkit/fileapi/mtp_device_interface_linux.h b/webkit/fileapi/mtp_device_interface_linux.h
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+// 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_MTP_DEVICE_INTERFACE_LINUX_H_
+#define WEBKIT_FILEAPI_MTP_DEVICE_INTERFACE_LINUX_H_
+
+#include "base/file_path.h"
+#include "base/memory/ref_counted.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;
+
+// Helper class to support MTP device isolated file system operations. This
+// class contains platform specific code to communicate with the attached
+// MTP device. We instantiate this class per MTP device. MTP device is
+// opened for communication during initialization and closed during
+// destruction.
+class MtpDeviceInterfaceLinux :
+    public base::RefCountedThreadSafe<MtpDeviceInterfaceLinux> {
+ public:
+  MtpDeviceInterfaceLinux(const FilePath::StringType& device_id);
+
+  PlatformFileError GetFileInfo(const FilePath& file_path,
+                                PlatformFileInfo* file_info);
+  FileSystemFileUtil::AbstractFileEnumerator* CreateFileEnumerator(
+      const FilePath& root, bool recursive);
+  PlatformFileError Touch(const FilePath& file_path,
+                          const base::Time& last_access_time,
+                          const base::Time& last_modified_time);
+  bool PathExists(const FilePath& file_path);
+  bool DirectoryExists(const FilePath& file_path);
+  bool IsDirectoryEmpty(const FilePath& file_path);
+
+ protected:
+  friend class base::RefCountedThreadSafe<MtpDeviceInterfaceLinux>;
+  virtual ~MtpDeviceInterfaceLinux();
+
+ private:
+  bool Init();
+
+  FilePath::StringType device_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(MtpDeviceInterfaceLinux);
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_MTP_DEVICE_INTERFACE_LINUX_H_