MD Bookmarks: Support policies for disabling bookmark editing

chrome/test/data/webui/md_bookmarks/md_bookmarks_focus_test.js

Index: chrome/test/data/webui/md_bookmarks/md_bookmarks_focus_test.js
diff --git a/chrome/test/data/webui/md_bookmarks/md_bookmarks_focus_test.js b/chrome/test/data/webui/md_bookmarks/md_bookmarks_focus_test.js
index 5c186542016ec9e22e2a5206aeac3983adae0ecc..bb52fab4cd79a44a2d0332d7436f4508f16c9e0e 100644
--- a/chrome/test/data/webui/md_bookmarks/md_bookmarks_focus_test.js
+++ b/chrome/test/data/webui/md_bookmarks/md_bookmarks_focus_test.js
@@ -186,12 +186,13 @@ TEST_F('MaterialBookmarksFocusTest', 'All', function() {
       chrome.bookmarkManagerPrivate.removeTrees = function() {}
 
       store.data.selection.items = new Set(['3', '4']);
+      store.data.selectedFolder = '2';
       store.notifyObservers();
 
-      getFolderNode('1').$.container.focus();
-      keydown('1', 'delete');
+      getFolderNode('2').$.container.focus();
+      keydown('2', 'delete');
 
-      commandManager.assertLastCommand(Command.DELETE, ['1']);
+      commandManager.assertLastCommand(Command.DELETE, ['2']);
     });
   });