Do not call stat() when reading directories via File API.

chrome/browser/media_galleries/mac/mtp_device_delegate_impl_mac.mm

 // 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.
 
 #include "chrome/browser/media_galleries/mac/mtp_device_delegate_impl_mac.h"
 
 #include <algorithm>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 449 matching lines @@
       }
       if (file_paths_[i].DirName() != read_path)
         continue;
 
       base::FilePath relative_path;
       read_path.AppendRelativePath(file_paths_[i], &relative_path);
       base::File::Info info = file_info_[file_paths_[i].value()];
       storage::DirectoryEntry entry;
       entry.name = relative_path.value();
       entry.is_directory = info.is_directory;
-      entry.size = info.size;
-      entry.last_modified_time = info.last_modified;
       entry_list.push_back(entry);
     }
 
     if (found_path) {
       content::BrowserThread::PostTask(content::BrowserThread::IO,
           FROM_HERE,
           base::Bind(iter->success_callback, entry_list, false));
     } else {
       content::BrowserThread::PostTask(content::BrowserThread::IO,
           FROM_HERE,
@@ skipping 80 matching lines @@
   std::string device_name = base::FilePath(device_location).BaseName().value();
   std::string device_id;
   storage_monitor::StorageInfo::Type type;
   bool cracked = storage_monitor::StorageInfo::CrackDeviceId(
       device_name, &type, &device_id);
   DCHECK(cracked);
   DCHECK_EQ(storage_monitor::StorageInfo::MAC_IMAGE_CAPTURE, type);
 
   cb.Run(new MTPDeviceDelegateImplMac(device_id, device_location));
 }