Move MTPDeviceDelegateImplLinux worker classes to its own files.

chrome/browser/media_gallery/linux/recursive_mtp_device_object_enumerator.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 CHROME_BROWSER_MEDIA_GALLERY_LINUX_RECURSIVE_MTP_DEVICE_OBJECT_ENUMERATOR_H_
+#define CHROME_BROWSER_MEDIA_GALLERY_LINUX_RECURSIVE_MTP_DEVICE_OBJECT_ENUMERATOR_H_
+
+#include <string>
+#include <vector>
+
+#include "base/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/time.h"
+#include "chrome/browser/media_transfer_protocol/mtp_file_entry.pb.h"
+#include "webkit/fileapi/file_system_file_util.h"
+
+namespace base {
+class SequencedTaskRunner;
+class WaitableEvent;
+}
+
+namespace chrome {
+
+// Recursively enumerate each file entry from a given media file entry set.
+class RecursiveMTPDeviceObjectEnumerator
+    : public fileapi::FileSystemFileUtil::AbstractFileEnumerator {
+ public:
+  RecursiveMTPDeviceObjectEnumerator(const std::string& handle,
+                                     base::SequencedTaskRunner* task_runner,
+                                     const std::vector<MtpFileEntry>& entries,
+                                     base::WaitableEvent* task_completed_event,
+                                     base::WaitableEvent* shutdown_event);
+
+  virtual ~RecursiveMTPDeviceObjectEnumerator();
+
+  // AbstractFileEnumerator:
+  virtual FilePath Next() OVERRIDE;
+  virtual int64 Size() OVERRIDE;
+  virtual bool IsDirectory() OVERRIDE;
+  virtual base::Time LastModifiedTime() OVERRIDE;
+
+ private:
+  // Stores the device handle that was used to open the device.
+  const std::string device_handle_;
+
+  // Stores a reference to |media_task_runner_| to construct and destruct
+  // ReadMTPDirectoryWorker object on the correct thread.
+  scoped_refptr<base::SequencedTaskRunner> media_task_runner_;
+
+  // List of top-level directory file entries.
+  const std::vector<MtpFileEntry> file_entries_;
+
+  // Iterator to access the individual file entries.
+  std::vector<MtpFileEntry>::const_iterator file_entry_iter_;
+
+  // Enumerator to access current directory Id/path entries.
+  scoped_ptr<fileapi::FileSystemFileUtil::AbstractFileEnumerator>
+      current_enumerator_;
+
+  // |media_task_runner_| can wait on this event until the requested operation
+  // is complete.
+  base::WaitableEvent* on_task_completed_event_;
+
+  // Stores a reference to waitable event associated with the shut down message.
+  base::WaitableEvent* on_shutdown_event_;
+
+  DISALLOW_COPY_AND_ASSIGN(RecursiveMTPDeviceObjectEnumerator);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_MEDIA_GALLERY_LINUX_RECURSIVE_MTP_DEVICE_OBJECT_ENUMERATOR_H_