Added "select all/none" checkbox.

chrome/browser/resources/shared/js/cr/ui/table/table_column_model.js

 // Copyright (c) 2011 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 This is a table column model
  */
 cr.define('cr.ui.table', function() {
   const EventTarget = cr.EventTarget;
   const Event = cr.Event;
@@ skipping 114 matching lines @@
       if (index < 0 || index >= this.columns_.size - 1)
         return;
       if (renderFunction !== this.columns_[index].renderFunction)
         return;
 
       this.columns_[index].renderFunction = renderFunction;
       cr.dispatchSimpleEvent(this, 'change');
     },
 
     /**
+     * Render the column header.
+     * @param {number} index The index of the column.
+     * @param {cr.ui.Table} Owner table.
+     */
+    renderHeader: function(index, table) {
+      var c = this.columns_[index];
+      return c.headerRenderFunction.call(c, table);
+    },
+
+    /**
      * The total width of the columns.
      * @type {number}
      */
     get totalWidth() {
       return this.totalWidth_;
     },
 
     /**
      * Normalizes widths to make their sum 100%.
      */
@@ skipping 18 matching lines @@
           return i;
       }
       return -1;
     },
   };
 
   return {
     TableColumnModel: TableColumnModel
   };
 });