Add an option to specify requested fields for fetching metadata.

content/browser/renderer_host/pepper/pepper_internal_file_ref_backend.cc

 // 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.
 
 #include "content/browser/renderer_host/pepper/pepper_internal_file_ref_backend.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/files/file_util.h"
@@ skipping 152 matching lines @@
   return PP_OK_COMPLETIONPENDING;
 }
 
 int32_t PepperInternalFileRefBackend::Query(
     ppapi::host::ReplyMessageContext reply_context) {
   if (!GetFileSystemURL().is_valid())
     return PP_ERROR_FAILED;
 
   GetFileSystemContext()->operation_runner()->GetMetadata(
       GetFileSystemURL(),
+      storage::FileSystemOperation::GET_METADATA_FIELD_IS_DIRECTORY |
+          storage::FileSystemOperation::GET_METADATA_FIELD_SIZE |
+          storage::FileSystemOperation::GET_METADATA_FIELD_LAST_MODIFIED,
       base::Bind(&PepperInternalFileRefBackend::GetMetadataComplete,
-                 weak_factory_.GetWeakPtr(),
-                 reply_context));
+                 weak_factory_.GetWeakPtr(), reply_context));
   return PP_OK_COMPLETIONPENDING;
 }
 
 void PepperInternalFileRefBackend::GetMetadataComplete(
     ppapi::host::ReplyMessageContext reply_context,
     base::File::Error error,
     const base::File::Info& file_info) {
   reply_context.params.set_result(ppapi::FileErrorToPepperError(error));
 
   PP_FileInfo pp_file_info;
@@ skipping 114 matching lines @@
   ChildProcessSecurityPolicyImpl* policy =
       ChildProcessSecurityPolicyImpl::GetInstance();
   if (!policy->CanReadFileSystemFile(render_process_id_, url) ||
       !policy->CanWriteFileSystemFile(render_process_id_, url)) {
     return PP_ERROR_NOACCESS;
   }
   return PP_OK;
 }
 
 }  // namespace content