Show the Managed Bookmarks folder in the views UI.

chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc

Index: chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
diff --git a/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc b/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
index 36e0dc685712142488595259d4c701410d14402d..b6e4c02b42c5f53fdff52f0e695797296822630c 100644
--- a/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
+++ b/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
@@ -594,7 +594,9 @@ bool BookmarkManagerPrivateDropFunction::RunOnReady() {
       NOTREACHED() <<"Somehow we're dropping null bookmark data";
       return false;
     }
-    chrome::DropBookmarks(GetProfile(), *drag_data, drop_parent, drop_index);
+    const bool copy = false;
+    chrome::DropBookmarks(
+        GetProfile(), *drag_data, drop_parent, drop_index, copy);
 
     router->ClearBookmarkNodeData();
     return true;