Switch the about:gpu implementation from an about handler to dom_ui....

chrome/browser/resources/net_internals/tabswitcherview.js

 // Copyright (c) 2010 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.
 
 /**
  * TabSwitcher is an implementation of View that handles tab switching.
  *
  *  +-----------------------------------+
  *  | Tab1 / Tab2 / Tab3 / ..           |  <- tab handle view
  *  +-----------------------------------+
  *  |                                   |
  *  |                                   |
  *  |                                   |
  *  |   stacked tab content areas       |
  *  |   (only 1 is visible at a time)   |
  *  |                                   |
  *  |                                   |
  *  |                                   |
  *  +-----------------------------------+
  *
  * @parameter {!View} tabHandleView the view that contains the tab handles.
  *
  * @constructor
  */
-function TabSwitcherView(tabHandleView) {
+function TabSwitcherView(tabHandleDivId) {
+  document.getElementById(tabHandleDivId).classList.add('tab-switcher-view');
+  var tabHandleView = new DivView(tabHandleDivId);
+
   View.call(this);
   this.tabHandleView_ = tabHandleView;
   this.tabs_ = [];
 }
 
 inherits(TabSwitcherView, View);
 
 TabSwitcherView.prototype.setGeometry = function(left, top, width, height) {
   TabSwitcherView.superClass_.setGeometry.call(this, left, top, width, height);
 
@@ skipping 79 matching lines @@
   if (oldTab)
     oldTab.setSelected(false);
 
   var newTab = this.findTabById(id);
   newTab.setSelected(true);
   if (params)
     newTab.contentView.setParameters(params);
 
   // Update data needed by newly active tab, as it may be
   // significantly out of date.
-  g_browser.checkForUpdatedInfo();
+  if (typeof g_browser != 'undefined' && g_browser.checkForUpdatedInfo)
+    g_browser.checkForUpdatedInfo();
 };
 
 TabSwitcherView.prototype.getAllTabIds = function() {
   var ids = [];
   for (var i = 0; i < this.tabs_.length; ++i)
     ids.push(this.tabs_[i].id);
   return ids;
 };
 
 //-----------------------------------------------------------------------------
@@ skipping 12 matching lines @@
   this.contentView.show(isSelected);
 };
 
 /**
  * Returns the DOM node that is used to select the tab.
  */
 TabEntry.prototype.getTabHandleNode = function() {
   return document.getElementById(this.id);
 };