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 cce08280a5858cbe14887b906028cb90b73f3668..4a13b0c59eb62b2c6db4717576e795cfcad04d84 100644
--- a/content/public/browser/download_item.h
+++ b/content/public/browser/download_item.h
@@ -91,6 +91,7 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
    public:
     virtual void OnDownloadUpdated(DownloadItem* download) {}
     virtual void OnDownloadOpened(DownloadItem* download) {}
+    virtual void OnDownloadShown(DownloadItem* download) {}
     virtual void OnDownloadRemoved(DownloadItem* download) {}
 
     // Called when the download is being destroyed. This happens after
@@ -397,9 +398,6 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   // Mark the download to be auto-opened when completed.
   virtual void SetOpenWhenComplete(bool open) = 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.