Add LockLayoutManager responsible for lock container (login/lock).

ash/test/test_shell_delegate.h

Index: ash/test/test_shell_delegate.h
diff --git a/ash/test/test_shell_delegate.h b/ash/test/test_shell_delegate.h
index d92f80dc9e1bc2d39039e8bd6239dd45705bfd97..01416170044a9a0a6a170ef2de356adb6f35deb8 100644
--- a/ash/test/test_shell_delegate.h
+++ b/ash/test/test_shell_delegate.h
@@ -11,6 +11,7 @@
 #include "ash/shell_delegate.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
 
 namespace keyboard {
 class KeyboardControllerProxy;
@@ -76,6 +77,8 @@ class TestShellDelegate : public ShellDelegate {
 
   scoped_ptr<content::BrowserContext> active_browser_context_;
 
+  ObserverList<ash::VirtualKeyboardStateObserver> keyboard_state_observer_list_;
+
   TestSessionStateDelegate* test_session_state_delegate_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(TestShellDelegate);