aura: Remove layerless windows.

ash/wm/workspace/workspace_window_resizer_unittest.cc

Index: ash/wm/workspace/workspace_window_resizer_unittest.cc
diff --git a/ash/wm/workspace/workspace_window_resizer_unittest.cc b/ash/wm/workspace/workspace_window_resizer_unittest.cc
index 6f5c9a72ed66448172f8f1b58063ad60bea1a9ba..ef01a6b2bb57acac9922f1b2d23123d073118a36 100644
--- a/ash/wm/workspace/workspace_window_resizer_unittest.cc
+++ b/ash/wm/workspace/workspace_window_resizer_unittest.cc
@@ -86,25 +86,25 @@ class WorkspaceWindowResizerTest : public test::AshTestBase {
     Shell::GetInstance()->SetDisplayWorkAreaInsets(root, gfx::Insets());
     window_.reset(new aura::Window(&delegate_));
     window_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
-    window_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
+    window_->Init(ui::LAYER_NOT_DRAWN);
     ParentWindowInPrimaryRootWindow(window_.get());
     window_->set_id(1);
 
     window2_.reset(new aura::Window(&delegate2_));
     window2_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
-    window2_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
+    window2_->Init(ui::LAYER_NOT_DRAWN);
     ParentWindowInPrimaryRootWindow(window2_.get());
     window2_->set_id(2);
 
     window3_.reset(new aura::Window(&delegate3_));
     window3_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
-    window3_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
+    window3_->Init(ui::LAYER_NOT_DRAWN);
     ParentWindowInPrimaryRootWindow(window3_.get());
     window3_->set_id(3);
 
     window4_.reset(new aura::Window(&delegate4_));
     window4_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
-    window4_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
+    window4_->Init(ui::LAYER_NOT_DRAWN);
     ParentWindowInPrimaryRootWindow(window4_.get());
     window4_->set_id(4);
   }