Make the auto-launch experiment profile-aware.

chrome/browser/resources/options2/browser_options.js

Index: chrome/browser/resources/options2/browser_options.js
===================================================================
--- chrome/browser/resources/options2/browser_options.js	(revision 120769)
+++ chrome/browser/resources/options2/browser_options.js	(working copy)
@@ -215,6 +215,8 @@
         $('set-as-default-browser').onclick = function(event) {
           chrome.send('becomeDefaultBrowser');
         };
+
+        $('auto-launch').onclick = this.handleAutoLaunchChanged_;
       }
 
       // Under the hood section.
@@ -331,6 +333,16 @@
     },
 
     /**
+      * Shows the autoLaunch preference and initializes its checkbox value.
+      * @param {bool} enabled Whether autolaunch is enabled or or not.
+      * @private
+      */
+    updateAutoLaunchState_: function(enabled) {
+      $('auto-launch-option').hidden = false;
+      $('auto-launch').checked = enabled;
+    },
+
+    /**
      * Called when the value of the instant.confirm_dialog_shown preference
      * changes. Cache this value.
      * @param {Event} event Change event.
@@ -475,6 +487,14 @@
     },
 
     /**
+     * Sets or clear whether Chrome should Auto-launch on computer startup.
+     * @private
+     */
+    handleAutoLaunchChanged_: function() {
+      chrome.send('toggleAutoLaunch', [$('auto-launch').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_.
@@ -617,6 +637,7 @@
     'setThemesResetButtonEnabled',
     'updateAccountPicture',
     'updateAutocompleteSuggestions',
+    'updateAutoLaunchState',
     'updateHomePageLabel',
     'updateSearchEngines',
     'updateStartupPages',