Hook up new API for easy unlock to update lock screen

ui/login/account_picker/screen_account_picker.js

Index: ui/login/account_picker/screen_account_picker.js
diff --git a/ui/login/account_picker/screen_account_picker.js b/ui/login/account_picker/screen_account_picker.js
index d4af56ba894927b545d4b1505cbf6e4f3f47c21a..69e922a653ee9aeca38a4dd69b50ef7306f0c5d4 100644
--- a/ui/login/account_picker/screen_account_picker.js
+++ b/ui/login/account_picker/screen_account_picker.js
@@ -29,7 +29,6 @@ login.createScreen('AccountPickerScreen', 'account-picker', function() {
       'showUserPodCustomIcon',
       'hideUserPodCustomIcon',
       'setAuthType',
-      'showEasyUnlockBubble',
       'setPublicSessionDisplayName',
       'setPublicSessionLocales',
       'setPublicSessionKeyboardLayouts',
@@ -279,8 +278,14 @@ login.createScreen('AccountPickerScreen', 'account-picker', function() {
      * Shows a custom icon in the user pod of |username|. This function
      * is used by the chrome.screenlockPrivate API.
      * @param {string} username Username of pod to add button
-     * @param {{scale1x: string, scale2x: string}} icon Dictionary of URLs of
-     *     the custom icon's representations for 1x and 2x scale factors.
+     * @param {!{resourceUrl: (string | undefined),
+     *           data: ({scale1x: string, scale2x: string} | undefined),
+     *           size: ({width: number, height: number} | undefined),
+     *           animation: ({resourceWidth: number, frameLength: number} |
+     *                       undefined),
+     *           opacity: (number | undefined),
+     *           tooltip: ({text: string, autoshow: boolean} | undefined)}} icon
+     *     The icon parameters.
      */
     showUserPodCustomIcon: function(username, icon) {
       $('pod-row').showUserPodCustomIcon(username, icon);
@@ -308,13 +313,6 @@ login.createScreen('AccountPickerScreen', 'account-picker', function() {
     },
 
     /**
-     * Shows a tooltip bubble explaining Easy Unlock.
-     */
-    showEasyUnlockBubble: function() {
-      $('pod-row').showEasyUnlockBubble();
-    },
-
-    /**
      * Updates the display name shown on a public session pod.
      * @param {string} userID The user ID of the public session
      * @param {string} displayName The new display name