Moves mash/wm into ash/mus

ash/mus/drag_window_resizer.cc

 // 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 "mash/wm/drag_window_resizer.h"
+#include "ash/mus/drag_window_resizer.h"
 
-namespace mash {
-namespace wm {
+namespace ash {
+namespace mus {
 
 DragWindowResizer::DragWindowResizer(
     std::unique_ptr<WindowResizer> next_window_resizer,
-    ash::wm::WindowState* window_state)
+    wm::WindowState* window_state)
     : WindowResizer(window_state),
       next_window_resizer_(std::move(next_window_resizer)) {}
 
 DragWindowResizer::~DragWindowResizer() {
   if (window_state_)
     window_state_->DeleteDragDetails();
 }
 
 void DragWindowResizer::Drag(const gfx::Point& location, int event_flags) {
   next_window_resizer_->Drag(location, event_flags);
   // http://crbug.com/613199.
   NOTIMPLEMENTED();
 }
 
 void DragWindowResizer::CompleteDrag() {
   next_window_resizer_->CompleteDrag();
   // http://crbug.com/613199.
   NOTIMPLEMENTED();
 }
 
 void DragWindowResizer::RevertDrag() {
   next_window_resizer_->RevertDrag();
   // http://crbug.com/613199.
   NOTIMPLEMENTED();
 }
 
-}  // namespace wm
-}  // namespace mash
+}  // namespace mus
+}  // namespace ash