Pin keyboard works with virtual keyboard.

chrome/browser/chromeos/login/lock/webui_screen_locker.cc

Index: chrome/browser/chromeos/login/lock/webui_screen_locker.cc
diff --git a/chrome/browser/chromeos/login/lock/webui_screen_locker.cc b/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
index 409da2e55ef5ae135d2141c13fa346c69926cf6c..fec31d829bd4189f2c7e386fa352918aaba2719a 100644
--- a/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
+++ b/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
@@ -373,12 +373,16 @@ void WebUIScreenLocker::OnKeyboardBoundsChanging(
     const gfx::Rect& new_bounds) {
   if (new_bounds.IsEmpty()) {
     // Keyboard has been hidden.
-    if (GetOobeUI())
+    if (GetOobeUI()) {
       GetOobeUI()->GetCoreOobeActor()->ShowControlBar(true);
+      GetOobeUI()->GetCoreOobeActor()->ShowPinKeyboard(true);
+    }
   } else {
     // Keyboard has been shown.
-    if (GetOobeUI())
+    if (GetOobeUI()) {
       GetOobeUI()->GetCoreOobeActor()->ShowControlBar(false);
+      GetOobeUI()->GetCoreOobeActor()->ShowPinKeyboard(false);
+    }
   }
 }