Add a password handler to get the list of passwords in md-settings.

chrome/browser/resources/settings/passwords_and_forms_page/passwords_private_api.js

Index: chrome/browser/resources/settings/passwords_and_forms_page/passwords_private_api.js
diff --git a/chrome/browser/resources/settings/passwords_and_forms_page/passwords_private_api.js b/chrome/browser/resources/settings/passwords_and_forms_page/passwords_private_api.js
new file mode 100644
index 0000000000000000000000000000000000000000..27528ce29c281cdcdf3b80aee85b3a61c96048da
--- /dev/null
+++ b/chrome/browser/resources/settings/passwords_and_forms_page/passwords_private_api.js
@@ -0,0 +1,50 @@
+// Copyright 2016 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.
+
+cr.define('settings.PasswordsPrivateApi', function() {
+  /**
+   * Encapsulates the calls between JS and C++ to update the list of passwords.
+   * @param {function(!Array<!Object>)} passwordListCallback Called with the
+   *     list of passwords.
+   * @param {function(!Array<!Object>)} exceptionListCallback Called with the
+   *     list of exceptions.
+   */
+  updatePasswordLists = function(passwordListCallback,

[michaelpg, 2016/01/20 21:20:56]

missing "var" here and elsewhere
or, just "function updatePasswordLists(..."

[hcarmona, 2016/01/20 23:13:53]

Done.

+                                 exceptionListCallback) {
+    settings.PasswordsPrivateApi.setSavedPasswordsList = passwordListCallback;
+    settings.PasswordsPrivateApi.setPasswordExceptionsList =
+        exceptionListCallback;
+    chrome.send('updatePasswordLists');
+  };
+
+  /**
+   * Callback for displaying a password.
+   * @param {number} index
+   * @param {string} password
+   */
+  showPassword = function(index, password) {
+    // TODO(hcarmona): Add function that will set this and call chrome.send to
+    //     show the password when requested.
+  };
+
+  /**
+   * Callback for updating the list of passwords.
+   * @param {!Array<!Object>} passwordList The list of passwords that was
+   *     retrieved by calling the private APIs.
+   */
+  setSavedPasswordsList = function(passwordList) {};
+
+
+  /**
+   * Callback for updating the list of site exceptions.
+   * @param {!Array<!Object>} exceptionList The list of sites that passwords
+   *     will not be saved for.
+   */
+  setPasswordExceptionsList = function(exceptionList) {};
+
+  return { updatePasswordLists: updatePasswordLists,
+           showPassword: showPassword,
+           setSavedPasswordsList: setSavedPasswordsList,
+           setPasswordExceptionsList: setPasswordExceptionsList, };
+});