Remove MTP support on Linux.

chrome/browser/media_galleries/linux/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_GALLERIES_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_
-#define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <vector>
-
-#include "base/files/file_path.h"
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "device/media_transfer_protocol/mtp_file_entry.pb.h"
-
-// Used to enumerate top-level files of an media file system.
-class MTPDeviceObjectEnumerator {
- public:
-  explicit MTPDeviceObjectEnumerator(const std::vector<MtpFileEntry>& entries);
-
-  ~MTPDeviceObjectEnumerator();
-
-  base::FilePath Next();
-  int64_t Size();
-  bool IsDirectory();
-  base::Time LastModifiedTime();
-
-  // If the current file entry is valid, returns true and fills in |entry_id|
-  // with the entry identifier else returns false and |entry_id| is not set.
-  bool GetEntryId(uint32_t* entry_id) const;
-
- private:
-  // Returns true if the enumerator has more entries to traverse, false
-  // otherwise.
-  bool HasMoreEntries() const;
-
-  // Returns true if Next() has been called at least once, and the enumerator
-  // has more entries to traverse.
-  bool IsIndexReadyAndInRange() const;
-
-  // List of directory file entries information.
-  const std::vector<MtpFileEntry> file_entries_;
-
-  // Index into |file_entries_|.
-  // Should only be used when |is_index_ready_| is true.
-  size_t index_;
-
-  // Initially false. Set to true after Next() has been called.
-  bool is_index_ready_;
-
-  DISALLOW_COPY_AND_ASSIGN(MTPDeviceObjectEnumerator);
-};
-
-#endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_