Cleanup return values in SnapshotFileDetails

chrome/browser/media_galleries/linux/snapshot_file_details.h

 // Copyright 2013 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_SNAPSHOT_FILE_DETAILS_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_SNAPSHOT_FILE_DETAILS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 41 matching lines @@
   }
 
   base::FilePath snapshot_file_path() const {
     return request_info_.snapshot_file_path;
   }
 
   uint32 bytes_written() const {
     return bytes_written_;
   }
 
-  const base::File::Info file_info() const {
+  const base::File::Info& file_info() const {
     return file_info_;
   }
 
   const MTPDeviceAsyncDelegate::CreateSnapshotFileSuccessCallback
       success_callback() const {
     return request_info_.success_callback;
   }
 
   const MTPDeviceAsyncDelegate::ErrorCallback error_callback() const {
     return request_info_.error_callback;
@@ skipping 30 matching lines @@
   // Number of bytes written into the snapshot file.
   uint32 bytes_written_;
 
   // Whether an error occurred during file transfer.
   bool error_occurred_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotFileDetails);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_SNAPSHOT_FILE_DETAILS_H_