[MD Bookmarks] Add toasts.

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 d36ae638e3299c4dbe2269ad4cbc7de582482b2d..ced55dca31336c94ab86e6fc366f1fc644b1c3b5 100644
--- a/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
+++ b/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
@@ -168,6 +168,20 @@ TEST_F('MaterialBookmarksFolderNodeTest', 'All', function() {
   mocha.run();
 });
 
+function MaterialBookmarksToastManagerTest() {}
+
+MaterialBookmarksToastManagerTest.prototype = {
+  __proto__: MaterialBookmarksBrowserTest.prototype,
+
+  extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
+    'toast_manager_test.js',
+  ]),
+};
+
+TEST_F('MaterialBookmarksToastManagerTest', 'All', function() {
+  mocha.run();
+});
+
 function MaterialBookmarksStoreClientTest() {}
 
 MaterialBookmarksStoreClientTest.prototype = {