Move stringify, form, navigation and scroll methods out of core.js.

ios/web/web_state/js/resources/common.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.
 
 // This file provides common methods that can be shared by other JavaScripts.
 
 goog.provide('__crWeb.common');
 
 goog.require('__crWeb.base');
 
 
 /** @typedef {HTMLInputElement|HTMLTextAreaElement|HTMLSelectElement} */
 var FormControlElement;
 
 /**
  * Namespace for this file. It depends on |__gCrWeb| having already been
  * injected. String 'common' is used in |__gCrWeb['common']| as it needs to be
  * accessed in Objective-C code.
  */
 __gCrWeb.common = {};
 
 // Store common namespace object in a global __gCrWeb object referenced by a
 // string, so it does not get renamed by closure compiler during the
 // minification.
 __gCrWeb['common'] = __gCrWeb.common;
 
 /* Beginning of anonymous object. */
 (function() {
+
   /**
    * JSON safe object to protect against custom implementation of Object.toJSON
    * in host pages.
    * @constructor
    */
   __gCrWeb.common.JSONSafeObject = function JSONSafeObject() {
   };
 
   /**
    * Protect against custom implementation of Object.toJSON in host pages.
    */
   __gCrWeb.common.JSONSafeObject.prototype['toJSON'] = null;
 
   /**
    * Retain the original JSON.stringify method where possible to reduce the
    * impact of sites overriding it
    */
   __gCrWeb.common.JSONStringify = JSON.stringify;
 
   /**
+   * Returns a string that is formatted according to the JSON syntax rules.
+   * This is equivalent to the built-in JSON.stringify() function, but is
+   * less likely to be overridden by the website itself.  Prefer the private
+   * {@code __gcrWeb.common.JSONStringify} whenever possible instead of using
+   * this public function. The |__gCrWeb| object itself does not use it; it uses
+   * its private counterpart instead.
+   */
+  __gCrWeb['stringify'] = function(value) {
+    if (value === null)
+      return 'null';
+    if (value === undefined)
+       return 'undefined';
+    if (typeof(value.toJSON) == 'function') {
+      // Prevents websites from changing stringify's behavior by adding the
+      // method toJSON() by temporarily removing it.
+      var originalToJSON = value.toJSON;
+      value.toJSON = undefined;
+      var stringifiedValue = __gCrWeb.common.JSONStringify(value);
+      value.toJSON = originalToJSON;
+      return stringifiedValue;
+    }
+    return __gCrWeb.common.JSONStringify(value);
+  };
+
+  /**
    * Prefix used in references to form elements that have no 'id' or 'name'
    */
   __gCrWeb.common.kNamelessFormIDPrefix = 'gChrome~';
 
   /**
    * Tests an element's visiblity. This test is expensive so should be used
    * sparingly.
    * @param {Element} element A DOM element.
    * @return {boolean} true if the |element| is currently part of the visible
    * DOM.
@@ skipping 623 matching lines @@
   __gCrWeb.common.updatePluginPlaceholders = function() {
     var plugins = findPluginNodesWithoutFallback_();
     if (plugins.length > 0) {
       // Store the list of plugins in a known place for the replacement script
       // to use, then trigger it.
       __gCrWeb['placeholderTargetPlugins'] = plugins;
       return true;
     }
     return false;
   };
+
 }());  // End of anonymous object