[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 7b8978601a98b4ac9aa751385cd30ae9f30b68fd..524b1be2e9d8b4d87bb7bad21a9b10dbf900928c 100644
--- a/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
+++ b/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
@@ -172,6 +172,20 @@ 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 MaterialBookmarksPolicyTest() {}
 
 MaterialBookmarksPolicyTest.prototype = {