Autofill button should get enabled and disabled according to the policy value.

chrome/browser/resources/options/personal_options.js

Index: chrome/browser/resources/options/personal_options.js
diff --git a/chrome/browser/resources/options/personal_options.js b/chrome/browser/resources/options/personal_options.js
index ac063bc06d19eb6b101817951e434a7aeac1340d..0c3e19783e6796dca8a28bd02bc7e2c86c872b9e 100644
--- a/chrome/browser/resources/options/personal_options.js
+++ b/chrome/browser/resources/options/personal_options.js
@@ -124,6 +124,15 @@ cr.define('options', function() {
         autofillEnabled.disabled = true;
         autofillEnabled.checked = false;
         cr.dispatchSimpleEvent(autofillEnabled, 'change');
+      } else {
+        Preferences.getInstance().addEventListener(
+            'autofill.enabled',
+            function(event) {
+              var managed = event.value && event.value['managed'];
+              var value = event.value && event.value['value'] != undefined ?
+                  event.value['value'] : event.value;
+              $('autofill-settings').disabled = managed && !value;
+            });
       }
     },