Move the download code to new directories:

chrome/browser/download/download_item_model.cc

 // Copyright (c) 2006-2008 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_item_model.h"
+#include "chrome/browser/download/download_item_model.h"
 
 #include "base/string_util.h"
-#include "chrome/browser/download_manager.h"
+#include "chrome/browser/download/download_manager.h"
 #include "chrome/common/l10n_util.h"
 #include "chrome/common/time_format.h"
 
 #include "generated_resources.h"
 
 DownloadItemModel::DownloadItemModel(DownloadItem* download)
     : download_(download) {
 }
 
 void DownloadItemModel::CancelTask() {
@@ skipping 61 matching lines @@
       break;
     case DownloadItem::REMOVING:
       break;
     default:
       NOTREACHED();
   }
 
   return status_text;
 }