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

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

Index: chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.js
diff --git a/chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.js b/chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.js
index b46e9fb3b2389df1a434bc8350d6d947227cd203..16f91b62895b5c171fca236da9d83e9a26a034d1 100644
--- a/chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.js
+++ b/chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.js
@@ -27,9 +27,9 @@ Polymer({
     /**
      * An array of passwords to display.
      * Lazy loaded when the password section is expanded.
+     * @type {!Array<!PasswordUiEntry>}

[michaelpg, 2016/01/27 00:49:11]

Please re-generate the passwords_private.js externs to use
the new chrome.passwordsPrivate.PasswordUiEntry style syntax, a la
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/closur...

[hcarmona, 2016/01/27 02:46:18]

Done.

      */
     savedPasswords: {
-      type: Array,
       value: function() { return []; },
     },
 
@@ -50,17 +50,10 @@ Polymer({
    */
   loadPasswords_: function(passwordSectionOpened) {
     if (passwordSectionOpened) {
-      // TODO(hcarmona): Get real data.
-      this.savedPasswords =
-          [{origin: 'otherwebsite.com',
-            username: 'bowser',
-            password: '************'},
-           {origin: 'otherlongwebsite.com',
-            username: 'koopa',
-            password: '*********'},
-           {origin: 'otherverylongwebsite.com',
-            username: 'goomba',
-            password: '******'}];
+      chrome.passwordsPrivate.onSavedPasswordsListChanged.addListener(
+          function(passwordList) {
+            this.savedPasswords = passwordList;
+          }.bind(this));
     }
   },
 });