Download shelf autohides on showing in shell, just same as regular open

chrome/browser/download/download_item_model.h

 // 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.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_MODEL_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_MODEL_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 147 matching lines @@
   // of this method will be different from DownloadItem::OpenDownload() if
   // ShouldPreferOpeningInBrowser().
   void OpenUsingPlatformHandler();
 
   // Whether the download was removed and this is currently being undone.
   bool IsBeingRevived() const;
 
   // Set whether the download is being revived.
   void SetIsBeingRevived(bool is_being_revived);
 
+  // Returns |true| if user opened or shown download item in shell. Download
+  // shelf checks this for autohide.
+  bool GetOpenedOrShown() const;
+
+  // Sets whether download was opened or shown in shell. Download shelf marks
+  // downloads as shown or opened if user manually closes the shelf.
+  void SetOpenedOrShown(bool opened_or_shown);
+
   content::DownloadItem* download() { return download_; }
 
   // Returns a string representations of the current download progress sizes. If
   // the total size of the download is known, this string looks like: "100/200
   // MB" where the numerator is the transferred size and the denominator is the
   // total size. If the total isn't known, returns the transferred size as a
   // string (e.g.: "100 MB").
   base::string16 GetProgressSizesString() const;
 
  private:
   // Returns a string indicating the status of an in-progress download.
   base::string16 GetInProgressStatusString() const;
 
   // The DownloadItem that this model represents. Note that DownloadItemModel
   // itself shouldn't maintain any state since there can be more than one
   // DownloadItemModel in use with the same DownloadItem.
   content::DownloadItem* download_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemModel);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_MODEL_H_