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

chrome/browser/ui/webui/options/personal_options_handler.h

Index: chrome/browser/ui/webui/options/personal_options_handler.h
diff --git a/chrome/browser/ui/webui/options/personal_options_handler.h b/chrome/browser/ui/webui/options/personal_options_handler.h
index eb58ce458c0825b93a2114d935fb9ee5e91da4fb..0a238c20827d4c0f38cdada008f5493cadd21951 100644
--- a/chrome/browser/ui/webui/options/personal_options_handler.h
+++ b/chrome/browser/ui/webui/options/personal_options_handler.h
@@ -50,6 +50,8 @@ class PersonalOptionsHandler : public OptionsPageUIHandler,
   void ThemesSetGTK(const ListValue* args);
 #endif
 
+  void UpdateAutofillUI();
+
 #if defined(OS_CHROMEOS)
   void LoadAccountPicture(const ListValue* args);
   NotificationRegistrar registrar_;
@@ -60,6 +62,8 @@ class PersonalOptionsHandler : public OptionsPageUIHandler,
   // True if the multiprofiles switch is enabled.
   bool multiprofile_;
 
+  BooleanPrefMember autofill_enabled_;
+
   DISALLOW_COPY_AND_ASSIGN(PersonalOptionsHandler);
 };