[ios] Put autofill scripts into anonymous function.

components/autofill/ios/browser/resources/suggestion_controller.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Installs suggestion management functions on the |__gCrWeb| object.
 
+/* Beginning of anonymous object. */
+(function() {
+
 /**
  * Namespace for this file. It depends on |__gCrWeb| having already been
  * injected.
  */
 __gCrWeb['suggestion'] = {};
 
 /**
  * Returns the first element in |elements| that is later than |elementToCompare|
  * in tab order.
  *
@@ skipping 289 matching lines @@
  * @return {boolean} Whether there is an element in the sequential navigation
  *     before the currently active element.
  */
 __gCrWeb.suggestion['hasPreviousElement'] = function(formName, fieldName) {
   var currentElement =
       formName ? __gCrWeb.suggestion.getFormElement(formName, fieldName) :
                  document.activeElement;
   return __gCrWeb.suggestion.getPreviousElementInTabOrder(
              currentElement, document.all) !== null;
 };
+
+}());  // End of anonymous object