WebUI: Fix more violations of no-extra-semi lint rule.

chrome/browser/resources/md_bookmarks/reducers.js

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Module of functions which produce a new page state in response
  * to an action. Reducers (in the same sense as Array.prototype.reduce) must be
  * pure functions: they must not modify existing state objects, or make any API
  * calls.
  */
@@ skipping 389 matching lines @@
         if (!nodes[action.id].children)
           return closedFolders;
 
         return ClosedFolderState.openFolderAndAncestors(
             closedFolders, action.parentId, nodes);
       case 'remove-bookmark':
         return bookmarks.util.removeIdsFromSet(
             closedFolders, action.descendants);
       default:
         return closedFolders;
-    };
+    }
   };
 
   /**
    * Root reducer for the Bookmarks page. This is called by the store in
    * response to an action, and the return value is used to update the UI.
    * @param {!BookmarksPageState} state
    * @param {Action} action
    * @return {!BookmarksPageState}
    */
   function reduceAction(state, action) {
@@ skipping 10 matching lines @@
 
   return {
     reduceAction: reduceAction,
     ClosedFolderState: ClosedFolderState,
     NodeState: NodeState,
     SearchState: SearchState,
     SelectedFolderState: SelectedFolderState,
     SelectionState: SelectionState,
   };
 });