Further code review changes for issue 8341027.

client/samples/total/src/Total.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library("Total");
-#import("dart:html");
+#import("../../../html/html.dart");
 #import("TotalLib.dart");
 
 class Total {
   static final int DEFAULT_VISIBLE_COLUMNS = 10;
   static final int DEFAULT_VISIBLE_ROWS = 25;
 
   Spreadsheet _spreadsheet;
   SpreadsheetPresenter _presenter;
 
   Total() {
@@ skipping 26 matching lines @@
     if (event.ctrlKey && event.keyCode == 68 /* d */) {
       Element db = document.query('#debugbar');
       if (db.classes.contains('on')) {
         db.classes.remove('on');
       } else {
         db.classes.add('on');
       }
     }
   }, false);
 }