Converts most of WorkspaceLayoutManager tests to use common code

ash/wm/lock_state_controller_unittest.cc

Index: ash/wm/lock_state_controller_unittest.cc
diff --git a/ash/wm/lock_state_controller_unittest.cc b/ash/wm/lock_state_controller_unittest.cc
index dd9a56658c560b819a9c5323c79541accfa51995..ef1ac93f813a82e3026e0fe111930e6543b1a51e 100644
--- a/ash/wm/lock_state_controller_unittest.cc
+++ b/ash/wm/lock_state_controller_unittest.cc
@@ -15,6 +15,7 @@
 #include "ash/test/test_lock_state_controller_delegate.h"
 #include "ash/test/test_screenshot_delegate.h"
 #include "ash/test/test_session_state_animator.h"
+#include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
 #include "ash/wm/power_button_controller.h"
 #include "ash/wm/session_state_animator.h"
@@ -319,7 +320,7 @@ class LockStateControllerTest : public AshTestBase {
     lock_state_controller_->OnLoginStateChanged(status);
     SetUserLoggedIn(status != LoginStatus::NOT_LOGGED_IN);
     if (status == LoginStatus::GUEST)
-      SetCanLockScreen(false);
+      TestSessionStateDelegate::SetCanLockScreen(false);
     lock_state_controller_->OnLockStateChanged(false);
   }