chromeos: Move files in //ash/common to //ash, part 2

ash/common/scoped_root_window_for_new_windows.cc

Index: ash/common/scoped_root_window_for_new_windows.cc
diff --git a/ash/common/scoped_root_window_for_new_windows.cc b/ash/common/scoped_root_window_for_new_windows.cc
deleted file mode 100644
index 28e24f00f6a7c0b9efe26e2b924d2e1278a5802e..0000000000000000000000000000000000000000
--- a/ash/common/scoped_root_window_for_new_windows.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2013 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/common/scoped_root_window_for_new_windows.h"
-
-#include "ash/common/wm_shell.h"
-#include "base/logging.h"
-
-namespace ash {
-
-ScopedRootWindowForNewWindows::ScopedRootWindowForNewWindows(
-    WmWindow* new_root) {
-  DCHECK(new_root);
-  WmShell::Get()->scoped_root_window_for_new_windows_ = new_root;
-}
-
-ScopedRootWindowForNewWindows::~ScopedRootWindowForNewWindows() {
-  WmShell::Get()->scoped_root_window_for_new_windows_ = nullptr;
-}
-
-}  // namespace ash