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

chrome/browser/download/download_util.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.
 //
 // Download utility implementation
 
 #define _USE_MATH_DEFINES  // For VC++ to get M_PI. This has to be first.
 
 #include "chrome/browser/download/download_util.h"
 
@@ skipping 57 matching lines @@
 #endif
 
 #if defined(USE_AURA)
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #endif
 
 namespace {
 
-// Key used to attach ShowInShelfData to a DownloadItem.
-const char kShowInShelfKey[] = "chrome.download_util.show_in_shelf";
-
-// Class that tracks the "show in download shelf" setting for a download item.
-class ShowInShelfData : public base::SupportsUserData::Data {
- public:
-  explicit ShowInShelfData(bool should_show) : should_show_(should_show) {
-  }
-
-  bool should_show() const { return should_show_; }
-
- private:
-  const bool should_show_;
-};
-
 // Get the opacity based on |animation_progress|, with values in [0.0, 1.0].
 // Range of return value is [0, 255].
 int GetOpacity(double animation_progress) {
   DCHECK(animation_progress >= 0 && animation_progress <= 1);
 
   // How many times to cycle the complete animation. This should be an odd
   // number so that the animation ends faded out.
   static const int kCompleteAnimationCycles = 5;
   double temp = animation_progress * kCompleteAnimationCycles * M_PI + M_PI_2;
   temp = sin(temp) / 2 + 0.5;
@@ skipping 406 matching lines @@
 void RecordDownloadCount(ChromeDownloadCountTypes type) {
   UMA_HISTOGRAM_ENUMERATION(
       "Download.CountsChrome", type, CHROME_DOWNLOAD_COUNT_TYPES_LAST_ENTRY);
 }
 
 void RecordDownloadSource(ChromeDownloadSource source) {
   UMA_HISTOGRAM_ENUMERATION(
       "Download.SourcesChrome", source, CHROME_DOWNLOAD_SOURCE_LAST_ENTRY);
 }
 
-bool ShouldShowInShelf(content::DownloadItem* item) {
-  ShowInShelfData* data =
-      static_cast<ShowInShelfData*>(item->GetUserData(kShowInShelfKey));
-  return !data || data->should_show();
-}
-
-void SetShouldShowInShelf(content::DownloadItem* item, bool should_show) {
-  item->SetUserData(kShowInShelfKey, new ShowInShelfData(should_show));
-}
-
 }  // namespace download_util