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

content/public/browser/download_item.h

Index: content/public/browser/download_item.h
diff --git a/content/public/browser/download_item.h b/content/public/browser/download_item.h
index 1e66f8b8a0d06ff62cf766820ff1e988dd25b0be..e1eaa01a58859dd40f9d01aa91a3723f86cd4170 100644
--- a/content/public/browser/download_item.h
+++ b/content/public/browser/download_item.h
@@ -89,6 +89,7 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
     virtual void OnDownloadUpdated(DownloadItem* download) {}
     virtual void OnDownloadOpened(DownloadItem* download) {}
     virtual void OnDownloadRemoved(DownloadItem* download) {}
+    virtual void OnDownloadShown(DownloadItem* download) {}
 
     // Called when the download is being destroyed. This happens after
     // every OnDownloadRemoved() as well as when the DownloadManager is going
@@ -321,9 +322,6 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   // SearchDownloads(), removed from main UI upon completion).
   virtual void SetIsTemporary(bool temporary) = 0;
 
-  // Mark the download as having been opened (without actually opening it).
-  virtual void SetOpened(bool opened) = 0;
-
   // Set a display name for the download that will be independent of the target
   // filename. If |name| is not empty, then GetFileNameToReportUser() will
   // return |name|. Has no effect on the final target filename.