Converts ash to use aura-mus

ash/mus/screenlock_layout.cc

Index: ash/mus/screenlock_layout.cc
diff --git a/ash/mus/screenlock_layout.cc b/ash/mus/screenlock_layout.cc
deleted file mode 100644
index faf2cb99991b01590beb6f87a8b5b35adf1d7ab8..0000000000000000000000000000000000000000
--- a/ash/mus/screenlock_layout.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2016 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/mus/screenlock_layout.h"
-
-#include "ash/mus/property_util.h"
-#include "services/ui/public/cpp/property_type_converters.h"
-#include "services/ui/public/cpp/window.h"
-#include "services/ui/public/cpp/window_property.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace ash {
-namespace mus {
-
-ScreenlockLayout::ScreenlockLayout(ui::Window* owner) : LayoutManager(owner) {}
-ScreenlockLayout::~ScreenlockLayout() {}
-
-// We explicitly don't make assertions about the number of children in this
-// layout as the number of children can vary when the application providing the
-// screenlock restarts.
-
-void ScreenlockLayout::LayoutWindow(ui::Window* window) {
-  gfx::Rect bounds = owner()->bounds();
-  bounds.Inset(-25, -25);
-  window->SetBounds(bounds);
-}
-
-}  // namespace mus
-}  // namespace ash