Add GPU memory tab to the task manager.

chrome/browser/resources/task_manager/main.js

 // Copyright (c) 2012 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.
 
 /** @constructor */
 function TaskManager() { }
 
 cr.addSingletonGetter(TaskManager);
 
 TaskManager.prototype = {
@@ skipping 97 matching lines @@
     this.selectionModel_.addEventListener('change',
                                           this.onSelectionChange.bind(this));
 
     // Initializes compare functions for column sort.
     var dm = this.dataModel_;
     // List of columns to sort by its numerical value as opposed to the
     // formatted value, e.g., 20480 vs. 20KB.
     var COLUMNS_SORTED_BY_VALUE = [
         'cpuUsage', 'physicalMemory', 'sharedMemory', 'privateMemory',
         'networkUsage', 'webCoreImageCacheSize', 'webCoreScriptsCacheSize',
-        'webCoreCSSCacheSize', 'fps', 'sqliteMemoryUsed', 'goatsTeleported',
-        'v8MemoryAllocatedSize'];
+        'webCoreCSSCacheSize', 'fps', 'videoMemory', 'sqliteMemoryUsed',
+        'goatsTeleported', 'v8MemoryAllocatedSize'];
 
     for (var i = 0; i < DEFAULT_COLUMNS.length; i++) {
       var columnId = DEFAULT_COLUMNS[i][0];
       var compareFunc = (function() {
           var columnIdToSort = columnId;
           if (COLUMNS_SORTED_BY_VALUE.indexOf(columnId) != -1)
             columnIdToSort += 'Value';
 
           return function(a, b) {
               var aValues = a[columnIdToSort];
@@ skipping 558 matching lines @@
 function init() {
   var params = parseQueryParams(window.location);
   var opt = {};
   opt['isBackgroundMode'] = params.background;
   opt['isShowCloseButton'] = params.showclose;
   taskmanager.initialize(document.body, opt);
 }
 
 document.addEventListener('DOMContentLoaded', init);
 document.addEventListener('Close', taskmanager.onClose.bind(taskmanager));