[Mac] DownloadShelf should be notified when autoclosing.

chrome/browser/download/download_shelf.cc

Index: chrome/browser/download/download_shelf.cc
diff --git a/chrome/browser/download/download_shelf.cc b/chrome/browser/download/download_shelf.cc
index 659bf6f4700e1df1e80e5e4d111126d4eb8d4eb5..a21faac72af40f4de342a96e7351c9f9fb50ba1a 100644
--- a/chrome/browser/download/download_shelf.cc
+++ b/chrome/browser/download/download_shelf.cc
@@ -63,12 +63,12 @@ void DownloadShelf::Show() {
   DoShow();
 }
 
-void DownloadShelf::Close() {
+void DownloadShelf::Close(CloseReason reason) {
   if (is_hidden_) {
     should_show_on_unhide_ = false;
     return;
   }
-  DoClose();
+  DoClose(reason);
 }
 
 void DownloadShelf::Hide() {
@@ -77,7 +77,7 @@ void DownloadShelf::Hide() {
   is_hidden_ = true;
   if (IsShowing()) {
     should_show_on_unhide_ = true;
-    DoClose();
+    DoClose(AUTOMATIC);
   }
 }