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

chrome/browser/platform_util.cc

Index: chrome/browser/platform_util.cc
diff --git a/chrome/browser/platform_util.cc b/chrome/browser/platform_util.cc
index 5cd2e45ef73213007c86668bb94730bee4517008..fbe787b73e6622e0203fea3afd2b39a64b1248d7 100644
--- a/chrome/browser/platform_util.cc
+++ b/chrome/browser/platform_util.cc
@@ -62,4 +62,10 @@ void OpenItem(Profile* profile,
                             item_type, callback));
 }
 
+void ShowItemInFolder(Profile* profile, const base::FilePath& full_path) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (shell_operations_allowed)
+    internal::PlatformShowItemInFolder(profile, full_path);
+}
+
 }  // namespace platform_util