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

chrome/browser/chromeos/file_system_provider/operations/read_directory.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/file_system_provider/operations/read_directory.h"
 
 #include <string>
 
 #include "base/memory/linked_ptr.h"
 #include "chrome/browser/chromeos/file_system_provider/operations/get_metadata.h"
@@ skipping 17 matching lines @@
     return false;
 
   for (size_t i = 0; i < params->entries.size(); ++i) {
     const linked_ptr<EntryMetadata> entry_metadata = params->entries[i];
     if (!ValidateIDLEntryMetadata(*entry_metadata, false /* root_entry */))
       return false;
 
     storage::DirectoryEntry output_entry;
     output_entry.is_directory = entry_metadata->is_directory;
     output_entry.name = entry_metadata->name;
-    output_entry.size = static_cast<int64>(entry_metadata->size);
-
-    std::string input_modification_time;
-    if (!entry_metadata->modification_time.additional_properties.GetString(
-            "value", &input_modification_time)) {
-      NOTREACHED();
-    }
-    if (!base::Time::FromString(input_modification_time.c_str(),
-                                &output_entry.last_modified_time)) {
-      NOTREACHED();
-    }
 
     output->push_back(output_entry);
   }
 
   return true;
 }
 
 }  // namespace
 
 ReadDirectory::ReadDirectory(
@@ skipping 48 matching lines @@
 void ReadDirectory::OnError(int /* request_id */,
                             scoped_ptr<RequestValue> /* result */,
                             base::File::Error error) {
   callback_.Run(
       error, storage::AsyncFileUtil::EntryList(), false /* has_more */);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos