Give the password list a CrScrollableBehavior to allow refresh to work.

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

Index: chrome/browser/resources/settings/passwords_and_forms_page/passwords_section.js
diff --git a/chrome/browser/resources/settings/passwords_and_forms_page/passwords_section.js b/chrome/browser/resources/settings/passwords_and_forms_page/passwords_section.js
index e8da6159cd3e9a48f63e7fbc7976b8ad5873a8de..41dead3e9361faf9034482f052e29a45cce8d1f3 100644
--- a/chrome/browser/resources/settings/passwords_and_forms_page/passwords_section.js
+++ b/chrome/browser/resources/settings/passwords_and_forms_page/passwords_section.js
@@ -20,6 +20,8 @@ var ExceptionPairEntryEvent;
 Polymer({
   is: 'passwords-section',
 
+  behaviors: [CrScrollableBehavior],
+
   properties: {
     /** Preferences state. */
     prefs: {
@@ -71,6 +73,16 @@ Polymer({
     'passwordList.scroll': 'closeMenu_',
   },
 
+  observers: ['passwordListChanged_(savedPasswords, filter)'],
+
+  /**
+   * Updates the scrollable contents when the list of passwords has changed.
+   * @private
+   */
+  passwordListChanged_: function() {
+    this.updateScrollableContents();
+  },
+
   /**
    * Sets the password in the current password dialog if the loginPair matches.
    * @param {!chrome.passwordsPrivate.LoginPair} loginPair