MD Bookmarks: Remove deleted nodes from state tree

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

Index: chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
diff --git a/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js b/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
index a1d8553b2aa2283444566fc59d31f14beb2bfc89..b8ead18614d2a735d01dadebe6304688ce7e91d4 100644
--- a/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
+++ b/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
@@ -142,3 +142,17 @@ MaterialBookmarksStoreClientTest.prototype = {
 TEST_F('MaterialBookmarksStoreClientTest', 'All', function() {
   mocha.run();
 });
+
+function MaterialBookmarksUtilTest() {}
+
+MaterialBookmarksUtilTest.prototype = {
+  __proto__: MaterialBookmarksBrowserTest.prototype,
+
+  extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
+    'util_test.js',
+  ]),
+};
+
+TEST_F('MaterialBookmarksUtilTest', 'All', function() {
+  mocha.run();
+});