Integrate About page into Settings for Chrome OS settings in a window.

chrome/browser/resources/help/help_page.js

Index: chrome/browser/resources/help/help_page.js
diff --git a/chrome/browser/resources/help/help_page.js b/chrome/browser/resources/help/help_page.js
index 10a1807a93a813abd2386e450a635a8c2ad52c0b..efd67923440628d4f11c179cd3587bb09d9cfdea 100644
--- a/chrome/browser/resources/help/help_page.js
+++ b/chrome/browser/resources/help/help_page.js
@@ -11,8 +11,9 @@ cr.define('help', function() {
    * confusion with generic AboutUI (about:memory, about:sandbox, etc.).
    */
   function HelpPage() {
-    Page.call(this, 'help', loadTimeData.getString('aboutTitle'),
-              'help-page');
+    var id = loadTimeData.valueExists('aboutOverlayTabTitle') ?
+      'aboutOverlayTabTitle' : 'aboutTitle';
+    Page.call(this, 'help', loadTimeData.getString(id), 'help-page');
   }
 
   cr.addSingletonGetter(HelpPage);
@@ -114,7 +115,7 @@ cr.define('help', function() {
         }
 
         $('change-channel').onclick = function() {
-          PageManager.showPageByName('channel-change-page', false);
+          PageManager.showPageByName('channel-change-page');
         };
 
         var channelChangeDisallowedError = document.createElement('div');
@@ -143,6 +144,12 @@ cr.define('help', function() {
       chrome.send('onPageLoaded');
     },
 
+    /** @override */
+    didClosePage: function() {
+      if ($('more-info-container').classList.contains('visible'))
+        this.toggleMoreInfo_();

[Dan Beam, 2014/08/13 17:03:18]

nit: i'd make a setMoreInfoVisible_ and use it here and in toggleMoreInfo_

[michaelpg, 2014/08/13 20:17:51]

Done.

+    },
+
     /**
      * Toggles the visible state of the 'More Info' section.
      * @private