Removes/promotes functions from WmWindowMus to WmWindowAura

ash/mus/bridge/wm_window_mus_test_api.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 "ash/mus/bridge/wm_window_mus_test_api.h"
-
-namespace ash {
-namespace mus {
-
-// static
-int WmWindowMusTestApi::GlobalMinimumSizeLock::instance_count_ = 0;
-
-WmWindowMusTestApi::GlobalMinimumSizeLock::GlobalMinimumSizeLock() {
-  if (instance_count_ == 0)
-    WmWindowMusTestApi::SetDefaultUseEmptyMinimumSizeForTesting(true);
-  instance_count_++;
-}
-
-WmWindowMusTestApi::GlobalMinimumSizeLock::~GlobalMinimumSizeLock() {
-  DCHECK_GT(instance_count_, 0);
-  instance_count_--;
-  if (instance_count_ == 0)
-    WmWindowMusTestApi::SetDefaultUseEmptyMinimumSizeForTesting(false);
-}
-
-// static
-void WmWindowMusTestApi::SetDefaultUseEmptyMinimumSizeForTesting(bool value) {
-  WmWindowMus::default_use_empty_minimum_size_for_testing_ = value;
-}
-
-}  // namespace mus
-}  // namespace ash