Add an option to specify requested fields for fetching metadata.

storage/browser/fileapi/copy_or_move_operation_delegate.cc

 // Copyright (c) 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 "storage/browser/fileapi/copy_or_move_operation_delegate.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ skipping 373 matching lines @@
         file_progress_callback_(file_progress_callback),
         cancel_requested_(false),
         weak_factory_(this) {}
 
   void Run(
       const CopyOrMoveOperationDelegate::StatusCallback& callback) override {
     // Reader can be created even if the entry does not exist or the entry is
     // a directory. To check errors before destination file creation,
     // check metadata first.
     operation_runner_->GetMetadata(
-        src_url_,
+        src_url_, FileSystemOperation::GET_METADATA_FIELD_IS_DIRECTORY |
+                      FileSystemOperation::GET_METADATA_FIELD_LAST_MODIFIED,
         base::Bind(&StreamCopyOrMoveImpl::RunAfterGetMetadataForSource,
                    weak_factory_.GetWeakPtr(), callback));
   }
 
   void Cancel() override {
     cancel_requested_ = true;
     if (copy_helper_)
       copy_helper_->Cancel();
   }
 
@@ skipping 472 matching lines @@
 void CopyOrMoveOperationDelegate::PostProcessDirectory(
     const FileSystemURL& src_url,
     const StatusCallback& callback) {
   if (option_ == FileSystemOperation::OPTION_NONE) {
     PostProcessDirectoryAfterTouchFile(
         src_url, callback, base::File::FILE_OK);
     return;
   }
 
   operation_runner()->GetMetadata(
-      src_url,
+      src_url, FileSystemOperation::GET_METADATA_FIELD_LAST_MODIFIED,
       base::Bind(
           &CopyOrMoveOperationDelegate::PostProcessDirectoryAfterGetMetadata,
           weak_factory_.GetWeakPtr(), src_url, callback));
 }
 
 void CopyOrMoveOperationDelegate::OnCancel() {
   // Request to cancel all running Copy/Move file.
   for (std::set<CopyOrMoveImpl*>::iterator iter = running_copy_set_.begin();
        iter != running_copy_set_.end(); ++iter)
     (*iter)->Cancel();
@@ skipping 129 matching lines @@
   base::FilePath relative = dest_root_.virtual_path();
   src_root_.virtual_path().AppendRelativePath(src_url.virtual_path(),
                                               &relative);
   return file_system_context()->CreateCrackedFileSystemURL(
       dest_root_.origin(),
       dest_root_.mount_type(),
       relative);
 }
 
 }  // namespace storage