Moves mash/wm into ash/mus

ash/mus/background_layout.cc

 // Copyright 2015 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 "mash/wm/background_layout.h"
+#include "ash/mus/background_layout.h"
 
 #include "components/mus/public/cpp/window.h"
 
-namespace mash {
-namespace wm {
+namespace ash {
+namespace mus {
 
-BackgroundLayout::BackgroundLayout(mus::Window* owner) : LayoutManager(owner) {}
+BackgroundLayout::BackgroundLayout(::mus::Window* owner)
+    : LayoutManager(owner) {}
 BackgroundLayout::~BackgroundLayout() {}
 
 // 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
 // background restarts.
 
-void BackgroundLayout::LayoutWindow(mus::Window* window) {
+void BackgroundLayout::LayoutWindow(::mus::Window* window) {
   window->SetBounds(gfx::Rect(owner()->bounds().size()));
 }
 
-}  // namespace wm
-}  // namespace mash
+}  // namespace mus
+}  // namespace ash