aura: Remove layerless windows.

ash/wm/workspace/workspace_window_resizer_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_window_resizer.h"
 
 #include "ash/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 68 matching lines @@
     gfx::Rect root_bounds(root->bounds());
 #if defined(OS_WIN)
     // RootWindow and Display can't resize on Windows Ash.
     // http://crbug.com/165962
     EXPECT_EQ(kRootHeight, root_bounds.height());
 #endif
     EXPECT_EQ(800, root_bounds.width());
     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);
   }
 
   void TearDown() override {
     window_.reset();
     window2_.reset();
     window3_.reset();
     window4_.reset();
     touch_resize_window_.reset();
@@ skipping 1759 matching lines @@
   // Drag even more to snap to the edge.
   generator.GestureScrollSequence(gfx::Point(400, kRootHeight - 40),
                                   gfx::Point(400, kRootHeight - 25),
                                   base::TimeDelta::FromMilliseconds(10),
                                   5);
   EXPECT_EQ(gfx::Rect(100, 100, 600, kRootHeight - 100).ToString(),
             touch_resize_window_->bounds().ToString());
 }
 
 }  // namespace ash