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

chrome/browser/chromeos/drive/fileapi/fileapi_worker.cc

 // Copyright 2014 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/chromeos/drive/fileapi/fileapi_worker.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/task_runner_util.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 64 matching lines @@
   std::vector<storage::DirectoryEntry> entries;
   // Convert drive files to File API's directory entry.
   entries.reserve(resource_entries->size());
   for (size_t i = 0; i < resource_entries->size(); ++i) {
     const ResourceEntry& resource_entry = (*resource_entries)[i];
     storage::DirectoryEntry entry;
     entry.name = resource_entry.base_name();
 
     const PlatformFileInfoProto& file_info = resource_entry.file_info();
     entry.is_directory = file_info.is_directory();
-    entry.size = file_info.size();
-    entry.last_modified_time =
-        base::Time::FromInternalValue(file_info.last_modified());
     entries.push_back(entry);
   }
 
   callback.Run(base::File::FILE_OK, entries, true /*has_more*/);
 }
 
 // Runs |callback| with |error|.
 void RunReadDirectoryCallbackOnCompletion(const ReadDirectoryCallback& callback,
                                           FileError error) {
   callback.Run(FileErrorToBaseFileError(error),
@@ skipping 263 matching lines @@
                const StatusCallback& callback,
                FileSystemInterface* file_system) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   file_system->TouchFile(file_path, last_access_time, last_modified_time,
                          base::Bind(&RunStatusCallbackByFileError, callback));
 
 }
 
 }  // namespace fileapi_internal
 }  // namespace drive