Makes Window::Init take a WindowLayerType instead of LayerType.

ash/root_window_controller.cc

Index: ash/root_window_controller.cc
diff --git a/ash/root_window_controller.cc b/ash/root_window_controller.cc
index 65414fddd2db4d7e2cac4a45b9dca1e8160a209e..ac607c5f0bbd151615db06d51ac15abcab4aecb5 100644
--- a/ash/root_window_controller.cc
+++ b/ash/root_window_controller.cc
@@ -92,7 +92,7 @@ aura::Window* CreateContainer(int window_id,
   aura::Window* container = new aura::Window(NULL);
   container->set_id(window_id);
   container->SetName(name);
-  container->Init(ui::LAYER_NOT_DRAWN);
+  container->Init(aura::WINDOW_LAYER_NOT_DRAWN);
   parent->AddChild(container);
   if (window_id != internal::kShellWindowId_UnparentedControlContainer)
     container->Show();
@@ -721,7 +721,7 @@ void RootWindowController::InitLayoutManagers() {
     // This window exists only to be a event target on login screen.
     // It does not have to handle events, nor be visible.
     mouse_event_target_.reset(new aura::Window(new EmptyWindowDelegate));
-    mouse_event_target_->Init(ui::LAYER_NOT_DRAWN);
+    mouse_event_target_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 
     aura::Window* lock_background_container =
         GetContainer(internal::kShellWindowId_LockScreenBackgroundContainer);