aura: Remove layerless windows.

ash/drag_drop/drag_drop_tracker.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/drag_drop/drag_drop_tracker.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "ui/aura/client/window_tree_client.h"
@@ skipping 26 matching lines @@
 // Creates a window for capturing drag events.
 aura::Window* CreateCaptureWindow(aura::Window* context_root,
                                   aura::WindowDelegate* delegate) {
   static CaptureWindowActivationDelegate* activation_delegate_instance = NULL;
   if (!activation_delegate_instance)
     activation_delegate_instance = new CaptureWindowActivationDelegate;
   aura::Window* window = new aura::Window(delegate);
   // Set type of window as popup to prevent different window manager codes
   // trying to manage this window.
   window->SetType(ui::wm::WINDOW_TYPE_POPUP);
-  window->Init(aura::WINDOW_LAYER_NOT_DRAWN);
+  window->Init(ui::LAYER_NOT_DRAWN);
   aura::client::ParentWindowWithContext(window, context_root, gfx::Rect());
   aura::client::SetActivationDelegate(window, activation_delegate_instance);
   window->Show();
   DCHECK(window->bounds().size().IsEmpty());
   return window;
 }
 
 }  // namespace
 
 DragDropTracker::DragDropTracker(aura::Window* context_root,
@@ skipping 34 matching lines @@
       capture_window_->GetRootWindow(),
       ash::wm::GetRootWindowAt(location_in_screen),
       &target_root_location);
   return new ui::MouseEvent(
       event.type(), target_location, target_root_location,
       ui::EventTimeForNow(), event.flags(),
       static_cast<const ui::MouseEvent&>(event).changed_button_flags());
 }
 
 }  // namespace ash