chromeos: converts PanelLayoutManager to aura::Window

ash/wm/workspace_controller_unittest.cc

Index: ash/wm/workspace_controller_unittest.cc
diff --git a/ash/wm/workspace_controller_unittest.cc b/ash/wm/workspace_controller_unittest.cc
index a5da8c8565cc93c3fa23e218c21059fd700a1b24..6ecd9b7f12ffa6f433896a78e09b0c91e9917e12 100644
--- a/ash/wm/workspace_controller_unittest.cc
+++ b/ash/wm/workspace_controller_unittest.cc
@@ -117,8 +117,7 @@ class WorkspaceControllerTest : public test::AshTestBase {
                                 const gfx::Rect& bounds) {
     aura::Window* window = CreateTestWindowInShellWithDelegateAndType(
         delegate, ui::wm::WINDOW_TYPE_PANEL, 0, bounds);
-    WmWindow* wm_window = WmWindow::Get(window);
-    PanelLayoutManager::Get(wm_window)->Relayout();
+    PanelLayoutManager::Get(window)->Relayout();
     return window;
   }