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

chrome/browser/ui/views/download/download_shelf_view.h

Index: chrome/browser/ui/views/download/download_shelf_view.h
diff --git a/chrome/browser/ui/views/download/download_shelf_view.h b/chrome/browser/ui/views/download/download_shelf_view.h
index 43e4fda185f4d9682bd0519e6e06740608d19ff8..a0942cecb265b861016e96daed499b48db48e309 100644
--- a/chrome/browser/ui/views/download/download_shelf_view.h
+++ b/chrome/browser/ui/views/download/download_shelf_view.h
@@ -50,7 +50,10 @@ class DownloadShelfView : public views::AccessiblePaneView,
   ~DownloadShelfView() override;
 
   // Sent from the DownloadItemView when the user opens an item.
-  void OpenedDownload();
+  void OnDownloadOpened();
+
+  // Sent from the DownloadItemView when the user shows an item in shell.
+  void OnDownloadShown();
 
   // Returns the relevant containing object that can load pages.
   // i.e. the |browser_|.
@@ -128,6 +131,9 @@ class DownloadShelfView : public views::AccessiblePaneView,
   // the shelf have been opened.
   bool CanAutoClose();
 
+  // Starts mouse watcher if we can auto close.
+  void TriggerAutoClose();
+
   // Returns the color of text for the shelf (used for deriving icon color).
   SkColor GetTextColorForIconMd();