cros: HTML fixes needed to reinitializing an existing lock WebUI.

ui/login/screen_container.css

Index: ui/login/screen_container.css
diff --git a/ui/login/screen_container.css b/ui/login/screen_container.css
index cf505f2dc03bee207feca5658384d909f13d7481..6e0fcfe849eb438969b333202efb89f6c90f9e15 100644
--- a/ui/login/screen_container.css
+++ b/ui/login/screen_container.css
@@ -34,6 +34,10 @@
                          checked to determine if loaded. */
 }
 
+.disable-pin-animation .pin-container {
+  transition: none;
+}
+
 #scroll-container {
   bottom: 0;        /* Allows content overlap with control bar. */
   left: 0;