Implement an AutoLaunch experiment for Chrome for certain brand codes.

chrome/browser/resources/options/browser_options.js

Index: chrome/browser/resources/options/browser_options.js
===================================================================
--- chrome/browser/resources/options/browser_options.js	(revision 111708)
+++ chrome/browser/resources/options/browser_options.js	(working copy)
@@ -113,6 +113,9 @@
         $('defaultBrowserUseAsDefaultButton').onclick = function(event) {
           chrome.send('becomeDefaultBrowser');
         };
+
+        $('autoLaunch').addEventListener('click',
+                                         this.handleAutoLaunchChanged_);
       }
 
       var startupPagesList = $('startupPagesList');
@@ -304,6 +307,13 @@
     },
 
     /**
+     * Set or clear whether Chrome should Auto-launch on computer startup.

[stuartmorgan, 2011/12/01 10:11:44]

s/Set/Sets/ (the previous two functions are incorrect)

+     */
+    handleAutoLaunchChanged_: function() {
+      chrome.send('toggleAutoLaunch', [Boolean($('autoLaunch').checked)]);
+    },
+
+    /**
      * Sends an asynchronous request for new autocompletion suggestions for the
      * the given query. When new suggestions are available, the C++ handler will
      * call updateAutocompleteSuggestions_.
@@ -328,6 +338,15 @@
         return;
       list.suggestions = suggestions;
     },
+
+    /**
+      * A handler for the C++ code to call us and and let us know whether the
+      * auto-launch option should be visible and what its value should be.

[stuartmorgan, 2011/12/01 10:11:44]

This comment doesn't match the implementation. If it should be communicating
visible state, that should be a bool. If not, the comment should say what it
actually does, which is show it unconditionally.

Also, this comment does follow the style guide for comment syntax; it should
start with a verb; see the previous two functions for examples.

+      */
+    updateAutoLaunchState_: function(enabled) {
+      $('autoLaunchOption').hidden = false;
+      $('autoLaunch').checked = enabled;
+    },
   };
 
   BrowserOptions.updateDefaultBrowserState = function(statusString, isDefault,
@@ -353,6 +372,10 @@
     BrowserOptions.getInstance().updateAutocompleteSuggestions_(suggestions);
   };
 
+  BrowserOptions.updateAutoLaunchState = function(enabled) {
+    BrowserOptions.getInstance().updateAutoLaunchState_(enabled);
+  };
+
   BrowserOptions.setInstantFieldTrialStatus = function(enabled) {
     BrowserOptions.getInstance().setInstantFieldTrialStatus_(enabled);
   };