MD Bookmarks: Add right-click context menu to sidebar folders

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

Index: chrome/test/data/webui/md_bookmarks/test_command_manager.js
diff --git a/chrome/test/data/webui/md_bookmarks/test_command_manager.js b/chrome/test/data/webui/md_bookmarks/test_command_manager.js
index 7dbc970708454e7b9e27ee1320a2e17edfd8aadd..3891435ee60e1f8dfe4e921ef81f698275361f6e 100644
--- a/chrome/test/data/webui/md_bookmarks/test_command_manager.js
+++ b/chrome/test/data/webui/md_bookmarks/test_command_manager.js
@@ -19,7 +19,11 @@ function TestCommandManager() {
     realHandle(command, itemIds);
   };
 
-  commandManager.assertLastCommand = function (command, ids) {
+  /**
+   * @param {Command} command
+   * @param {!Array<string>} ids
+   */
+  commandManager.assertLastCommand = function(command, ids) {
     assertEquals(command, lastCommand);
     if (ids)
       assertDeepEquals(ids, normalizeSet(lastCommandIds));
@@ -27,5 +31,10 @@ function TestCommandManager() {
     lastCommandIds = null;
   };
 
+  /** @param {!Array<string>} ids */
+  commandManager.assertMenuOpenForIds = function(ids) {
+    assertDeepEquals(ids, normalizeSet(commandManager.menuIds_));
+  };
+
   return commandManager;
 }