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

content/public/test/mock_download_item.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.
 
 #include "content/public/test/mock_download_item.h"
 
 namespace content {
 
 MockDownloadItem::MockDownloadItem() {}
 
 MockDownloadItem::~MockDownloadItem() {
   for (auto& observer : observers_)
     observer.OnDownloadDestroyed(this);
 }
 
 void MockDownloadItem::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void MockDownloadItem::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void MockDownloadItem::NotifyObserversDownloadOpened() {
   for (auto& observer : observers_)
     observer.OnDownloadOpened(this);
 }
 
+void MockDownloadItem::NotifyObserversDownloadShown() {
+  for (auto& observer : observers_)
+    observer.OnDownloadShown(this);
+}
+
 void MockDownloadItem::NotifyObserversDownloadRemoved() {
   for (auto& observer : observers_)
     observer.OnDownloadRemoved(this);
 }
 
 void MockDownloadItem::NotifyObserversDownloadUpdated() {
   for (auto& observer : observers_)
     observer.OnDownloadUpdated(this);
 }
 
 }