[MD Bookmarks] Add edit folder.

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

Index: chrome/test/data/webui/md_bookmarks/store_test.js
diff --git a/chrome/test/data/webui/md_bookmarks/store_test.js b/chrome/test/data/webui/md_bookmarks/store_test.js
index 67b65c14df8e7bdc85a59b0e378c576602fd826e..0c94b393957a830936003a75bd7c716a81bae1a0 100644
--- a/chrome/test/data/webui/md_bookmarks/store_test.js
+++ b/chrome/test/data/webui/md_bookmarks/store_test.js
@@ -223,6 +223,12 @@ suite('<bookmarks-store>', function() {
     assertEquals('http://www.google.com', store.idToNodeMap_['2'].url);
   });
 
+  test('folder gets updated after renaming', function() {
+    store.onBookmarkChanged_('3', {'title': 'Main Folder'});
+    assertEquals('Main Folder', store.idToNodeMap_['3'].title);
+    assertEquals(undefined, store.idToNodeMap_['3'].url);
+  });
+
   //////////////////////////////////////////////////////////////////////////////
   // search tests: