Add fade to white animation when power button is pressed on Athena

athena/main/athena_launcher.cc

Index: athena/main/athena_launcher.cc
diff --git a/athena/main/athena_launcher.cc b/athena/main/athena_launcher.cc
index 04b55a77f2981ad82955f8b15ebdfe329f1622e3..11dbab5c179b035f8cedb14b40ab2ee80883ba0c 100644
--- a/athena/main/athena_launcher.cc
+++ b/athena/main/athena_launcher.cc
@@ -69,9 +69,9 @@ void StartAthena(aura::Window* root_window,
   aura::client::SetVisibilityClient(root_window,
                                     root_window_state->visibility_client.get());
 
-  athena::SystemUI::Create();
   athena::InputManager::Create()->OnRootWindowCreated(root_window);
   athena::ScreenManager::Create(root_window);
+  athena::SystemUI::Create();
   athena::WindowManager::Create();
   athena::HomeCard::Create(app_model_builder);
   athena::ActivityManager::Create();
@@ -84,9 +84,9 @@ void ShutdownAthena() {
   athena::ActivityManager::Shutdown();
   athena::HomeCard::Shutdown();
   athena::WindowManager::Shutdown();
+  athena::SystemUI::Shutdown();
   athena::ScreenManager::Shutdown();
   athena::InputManager::Shutdown();
-  athena::SystemUI::Shutdown();
 
   delete views::ViewsDelegate::views_delegate;
 }