[Linux, Media Gallery] Fix MTPRecursiveDeviceObjectEnumerator to recursively enumerate all the medi…

chrome/browser/media_gallery/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_GALLERY_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_
 #define CHROME_BROWSER_MEDIA_GALLERY_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_
 
 #include <vector>
 
 #include "base/file_path.h"
@@ skipping 12 matching lines @@
   explicit MTPDeviceObjectEnumerator(const MtpFileEntries& entries);
 
   virtual ~MTPDeviceObjectEnumerator();
 
   // AbstractFileEnumerator:
   virtual FilePath Next() OVERRIDE;
   virtual int64 Size() OVERRIDE;
   virtual bool IsDirectory() OVERRIDE;
   virtual base::Time LastModifiedTime() OVERRIDE;
 
+  // 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;
+
+  // Returns true if the enumerator has more entries to traverse, false
+  // otherwise.
+  bool HasMoreEntries() const;
+
  private:
   // List of directory file entries information.
   const MtpFileEntries file_entries_;
 
   // Iterator to access the individual file entries.
   MtpFileEntries::const_iterator file_entry_iter_;
 
   // Stores the current file information.
   MtpFileEntry current_file_info_;
 
   DISALLOW_COPY_AND_ASSIGN(MTPDeviceObjectEnumerator);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERY_LINUX_MTP_DEVICE_OBJECT_ENUMERATOR_H_