Adding a visibility property to cr.ui.table.TableColumn.

ui/webui/resources/js/cr/ui/table/table_column.js

Index: ui/webui/resources/js/cr/ui/table/table_column.js
diff --git a/ui/webui/resources/js/cr/ui/table/table_column.js b/ui/webui/resources/js/cr/ui/table/table_column.js
index 193ca8675a35baa82bf6079fc69d06d20b7a700c..66f77ec1b7488faaf3fa1d9530092d9900daf643 100644
--- a/ui/webui/resources/js/cr/ui/table/table_column.js
+++ b/ui/webui/resources/js/cr/ui/table/table_column.js
@@ -23,6 +23,7 @@ cr.define('cr.ui.table', function() {
     this.name_ = name;
     this.width_ = width;
     this.endAlign_ = !!opt_endAlign;
+    this.visible_ = true;
   }
 
   TableColumn.prototype = {
@@ -40,6 +41,9 @@ cr.define('cr.ui.table', function() {
       tableColumn.renderFunction = this.renderFunction_;
       tableColumn.headerRenderFunction = this.headerRenderFunction_;
       tableColumn.defaultOrder = this.defaultOrder_;
+
+      tableColumn.visible_  = this.visible_;
+
       return tableColumn;
     },
 
@@ -54,6 +58,7 @@ cr.define('cr.ui.table', function() {
       var div = /** @type {HTMLElement} */
           (table.ownerDocument.createElement('div'));
       div.textContent = dataItem[columnId];
+      div.hidden = !this.visible;
       return div;
     },
 
@@ -65,6 +70,23 @@ cr.define('cr.ui.table', function() {
     headerRenderFunction_: function(table) {
       return table.ownerDocument.createTextNode(this.name);
     },
+
+    /**
+     * The width of the column.  Hidden columns have zero width.
+     * @type {number}
+     */
+    get width() {
+      return this.visible_ ? this.width_ : 0;
+    },
+
+    /**
+     * The width of the column, disregarding visibility.  For hidden columns,
+     * this would be the width of the column if it were to be made visible.
+     * @type {number}
+     */
+    get absoluteWidth() {
+      return this.width_;
+    },
   };
 
   /**
@@ -86,6 +108,12 @@ cr.define('cr.ui.table', function() {
   cr.defineProperty(TableColumn, 'width');
 
   /**
+   * The column visibility.
+   * @type {boolean}
+   */
+  cr.defineProperty(TableColumn, 'visible');
+
+  /**
    * True if the column is aligned to end.
    * @type {boolean}
    */