Remove hasPasswordField from the public __gCrWeb API.

ios/chrome/browser/passwords/resources/password_controller.js

 // Copyright 2012 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 adheres to closure-compiler conventions in order to enable
 // compilation with ADVANCED_OPTIMIZATIONS. See http://goo.gl/FwOgy
 //
 // Installs password management functions on the |__gCrWeb| object.
 //
 // Finds all password forms in the current document and extracts
@@ skipping 16 matching lines @@
    * @return {string} Form data as a JSON string.
    */
   __gCrWeb['findPasswordForms'] = function() {
     var formDataList = [];
     if (hasPasswordField_(window)) {
       __gCrWeb.getPasswordFormDataList(formDataList, window);
     }
     return __gCrWeb.stringify(formDataList);
   };
 
-  /**
-   * Returns true if the top window or any frames inside contain an input field
-   * of type 'password'. This method is only used for unit tests and are only
-   * kept for legacy reasons. Prefer to use the private
-   * {@code hasPasswordField_} within this file.
-   * @return {boolean} Whether a password field exists.
-   *
-   * TODO(crbug.com/614092): investigate if this method can be completely
-   * removed from the gCrWeb public interface.
-   */
-  __gCrWeb['hasPasswordField'] = function() {
-    return hasPasswordField_(window);
-  };
-
   /** Returns true if the supplied window or any frames inside contain an input
    * field of type 'password'.
    * @private
    */
   var hasPasswordField_ = function(win) {
     var doc = win.document;
 
     // We may will not be allowed to read the 'document' property from a frame
     // that is in a different domain.
     if (!doc) {
@@ skipping 406 matching lines @@
       'method': formElement.getAttribute('method'),
       'name': __gCrWeb.common.getFormIdentifier(formElement),
       'origin': origin,
       'fields': fields,
       'usernameElement': usernameElement,
       'usernameValue': usernameValue,
       'passwords': passwords
     };
   };
 }