Move the core download files to content.

chrome/browser/download/download_types.cc

-// Copyright (c) 2011 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/download/download_types.h"
-
-DownloadBuffer::DownloadBuffer() {
-}
-
-DownloadBuffer::~DownloadBuffer() {
-}
-
-DownloadSaveInfo::DownloadSaveInfo() {
-}
-
-DownloadSaveInfo::DownloadSaveInfo(const DownloadSaveInfo& info)
-    : file_path(info.file_path),
-      file_stream(info.file_stream),
-      suggested_name(info.suggested_name) {
-}
-
-DownloadSaveInfo::~DownloadSaveInfo() {
-}
-
-DownloadSaveInfo& DownloadSaveInfo::operator=(const DownloadSaveInfo& info) {
-  file_path = info.file_path;
-  file_stream = info.file_stream;
-  suggested_name = info.suggested_name;
-  return *this;
-}