Use DownloadItemModel for storing chrome/ specific UI data for DownloadItems.

chrome/browser/download/download_browsertest.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 <sstream>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ref_counted.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
 #include "base/stringprintf.h"
 #include "base/test/test_file_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/common/cancelable_request.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
 #include "chrome/browser/download/download_crx_util.h"
 #include "chrome/browser/download/download_history.h"
+#include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_shelf.h"
 #include "chrome/browser/download/download_test_file_chooser_observer.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
@@ skipping 120 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TestRenderViewContextMenu);
 };
 
 bool WasAutoOpened(DownloadItem* item) {
   return item->GetAutoOpened();
 }
 
 // Called when a download starts. Marks the download as hidden.
 void SetHiddenDownloadCallback(DownloadItem* item, net::Error error) {
-  download_util::SetShouldShowInShelf(item, false);
+  DownloadItemModel(item).SetShouldShowInShelf(false);
 }
 
 }  // namespace
 
 // While an object of this class exists, it will mock out download
 // opening for all downloads created on the specified download manager.
 class MockDownloadOpeningObserver : public DownloadManager::Observer {
  public:
   explicit MockDownloadOpeningObserver(DownloadManager* manager)
       : download_manager_(manager) {
@@ skipping 2052 matching lines @@
   WebContents* web_contents = chrome::GetActiveWebContents(browser());
   scoped_ptr<DownloadUrlParameters> params(
       DownloadUrlParameters::FromWebContents(web_contents, url));
   params->set_callback(base::Bind(&SetHiddenDownloadCallback));
   download_manager->DownloadUrl(params.Pass());
   observer->WaitForFinished();
 
   // Verify that download shelf is not shown.
   EXPECT_FALSE(browser()->window()->IsDownloadShelfVisible());
 }