Proper focus input field instead of whole pod

This CL fixes focus regression introduced in https://codereview.chromium.org/908033005

BUG=450465
TEST=manual

Review URL: https://codereview.chromium.org/951783003

Cr-Commit-Position: refs/heads/master@{#317777}
(cherry picked from commit 2672bd9)

Review URL: https://codereview.chromium.org/962523004

Cr-Commit-Position: refs/branch-heads/2311@{#34}
Cr-Branched-From: 09b7de5-refs/heads/master@{#317474}

ui/login/account_picker/user_pod_row.js

@@ -2770,9 +2770,13 @@ cr.define('login', function() {
       if (podToFocus) {
         podToFocus.classList.remove('faded');
         podToFocus.classList.add('focused');
-        if (podToFocus.multiProfilesPolicyApplied)
+        if (!podToFocus.multiProfilesPolicyApplied) {
+          podToFocus.classList.toggle('signing-in', false);
+          podToFocus.focusInput();
+        } else {
           podToFocus.userTypeBubbleElement.classList.add('bubble-shown');
-        podToFocus.focus();
+          podToFocus.focus();
+        }
 
         // focusPod() automatically loads wallpaper
         if (!podToFocus.user.isApp)