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

chrome/browser/media_gallery/linux/mtp_device_object_enumerator.h

Index: chrome/browser/media_gallery/linux/mtp_device_object_enumerator.h
diff --git a/chrome/browser/media_gallery/linux/mtp_device_object_enumerator.h b/chrome/browser/media_gallery/linux/mtp_device_object_enumerator.h
index 340298ad3ed42bb8d37e0772bea7201865e62689..eda2da2561e4f8b593071b42103c0cca8a103602 100644
--- a/chrome/browser/media_gallery/linux/mtp_device_object_enumerator.h
+++ b/chrome/browser/media_gallery/linux/mtp_device_object_enumerator.h
@@ -30,6 +30,14 @@ class MTPDeviceObjectEnumerator
   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);
+
+  // Returns true if the enumerator has more entries to traverse, false
+  // otherwise.
+  bool HasMoreEntries();
+
  private:
   // List of directory file entries information.
   const MtpFileEntries file_entries_;