gdata: Convert GDataFileSystem::AddUploadFile() to asynchronous.

chrome/browser/chromeos/gdata/gdata_upload_file_info.cc

 // 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/chromeos/gdata/gdata_upload_file_info.h"
 
 #include "base/string_number_conversions.h"
 #include "chrome/browser/chromeos/gdata/gdata_parser.h"
 
 namespace gdata {
 
 UploadFileInfo::UploadFileInfo()
     : upload_id(-1),
       file_size(0),
       content_length(0),
       file_stream(NULL),
       buf_len(0),
       start_range(0),
       end_range(-1),
       all_bytes_present(false),
       upload_paused(false),
       should_retry_file_open(false),
       num_file_open_tries(0) {
 }
 
 UploadFileInfo::~UploadFileInfo() {
+  // The file stream is closed by the destructor asynchronously.
+  if (file_stream) {
+    delete file_stream;
+    file_stream = NULL;
+  }
 }
 
 int64 UploadFileInfo::SizeRemaining() const {
   DCHECK(file_size > end_range);
   // Note that uploaded_bytes = end_range + 1;
   return file_size - end_range - 1;
 }
 
 std::string UploadFileInfo::DebugString() const {
   return "title=[" + title +
          "], file_path=[" + file_path.value() +
          "], content_type=[" + content_type +
          "], file_size=[" + base::UintToString(file_size) +
          "], gdata_path=[" + gdata_path.value() +
          "]";
 }
 
 }  // namespace gdata