Make bookmark context menu asynchronous

chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.cc

Index: chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.cc
diff --git a/chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.cc b/chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.cc
index 0b3a298bde3a3e251fbd934a10d7ba96f963231a..80695d769420558aec3bda5a6a5485dd17b6b2f3 100644
--- a/chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.cc
+++ b/chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.cc
@@ -320,7 +320,6 @@ bool BookmarkMenuDelegate::ShowContextMenu(MenuItemView* source,
       ShouldCloseOnRemove(node)));
   context_menu_->set_observer(this);
   context_menu_->RunMenuAt(p, source_type);
-  context_menu_.reset(nullptr);
   return true;
 }
 
@@ -434,6 +433,10 @@ void BookmarkMenuDelegate::DidRemoveBookmarks() {
   is_mutating_model_ = false;
 }
 
+void BookmarkMenuDelegate::OnContextMenuClosed() {
+  context_menu_.reset();
+}
+
 bool BookmarkMenuDelegate::ShouldCloseOnRemove(const BookmarkNode* node) const {
   // We never need to close when embedded in the app menu.
   const bool is_shown_from_app_menu = parent_menu_item_ != nullptr;