aura: Remove layerless windows.

ash/wm/workspace/workspace_event_handler_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/workspace/workspace_event_handler.h"
 
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state.h"
@@ skipping 39 matching lines @@
 class WorkspaceEventHandlerTest : public test::AshTestBase {
  public:
   WorkspaceEventHandlerTest() {}
   ~WorkspaceEventHandlerTest() override {}
 
  protected:
   aura::Window* CreateTestWindow(aura::WindowDelegate* delegate,
                                  const gfx::Rect& bounds) {
     aura::Window* window = new aura::Window(delegate);
     window->SetType(ui::wm::WINDOW_TYPE_NORMAL);
-    window->Init(aura::WINDOW_LAYER_TEXTURED);
+    window->Init(ui::LAYER_TEXTURED);
     ParentWindowInPrimaryRootWindow(window);
     window->SetBounds(bounds);
     window->Show();
     return window;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WorkspaceEventHandlerTest);
 };
 
@@ skipping 472 matching lines @@
   delegate.set_window_component(HTCAPTION);
   generator.PressRightButton();
   generator.ReleaseRightButton();
   EXPECT_FALSE(window_state->IsMaximized());
   ClickButtonWithFlags(&generator, ui::EF_LEFT_MOUSE_BUTTON,
                        ui::EF_IS_DOUBLE_CLICK);
   EXPECT_FALSE(window_state->IsMaximized());
 }
 
 }  // namespace ash