chromeos: convert remaining AshTest usage to AshTestBase

ash/mus/test/wm_test_helper.h

Index: ash/mus/test/wm_test_helper.h
diff --git a/ash/mus/test/wm_test_helper.h b/ash/mus/test/wm_test_helper.h
deleted file mode 100644
index f28c7582fd79f81b9193e27a61e6d3d3bce346ea..0000000000000000000000000000000000000000
--- a/ash/mus/test/wm_test_helper.h
+++ /dev/null
@@ -1,94 +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.
-
-#ifndef ASH_MUS_TEST_WM_TEST_HELPER_H_
-#define ASH_MUS_TEST_WM_TEST_HELPER_H_
-
-#include <memory>
-
-#include "ash/mus/window_manager_application.h"
-#include "base/macros.h"
-#include "ui/aura/test/mus/test_window_tree_client_setup.h"
-
-namespace aura {
-class WindowTreeClientPrivate;
-}
-
-namespace base {
-class MessageLoop;
-class SequencedWorkerPoolOwner;
-}
-
-namespace ui {
-class InputDeviceClient;
-}
-
-namespace views {
-class ViewsDelegate;
-}
-
-namespace ash {
-
-class RootWindowController;
-
-namespace mus {
-
-// WMTestHelper is responsible for configuring a WindowTreeClient that
-// does not talk to mus.
-class WmTestHelper {
- public:
-  WmTestHelper();
-  ~WmTestHelper();
-
-  void Init();
-
-  WindowManagerApplication* window_manager_app() {
-    return window_manager_app_.get();
-  }
-
-  // Returns the RootWindowControllers ordered by display id (which we assume
-  // correlates with creation order).
-  std::vector<RootWindowController*> GetRootsOrderedByDisplayId();
-
-  void UpdateDisplay(const std::string& display_spec);
-
- private:
-  // Creates a new RootWindowController given |display_spec|, which is the
-  // configuration of the display. On entry |next_x| is the x-coordinate to
-  // place the display at, on exit |next_x| is set to the x-coordinate to place
-  // the next display at.
-  RootWindowController* CreateRootWindowController(
-      const std::string& display_spec,
-      int* next_x);
-
-  // Updates the display of an existing RootWindowController. See
-  // CreateRootWindowController() for details on |next_x|.
-  void UpdateDisplay(RootWindowController* root_window_controller,
-                     const std::string& display_spec,
-                     int* next_x);
-
-  // Destroys a RootWindowController.
-  void DestroyRootWindowController(
-      RootWindowController* root_window_controller);
-
-  std::unique_ptr<base::MessageLoop> message_loop_;
-  std::unique_ptr<views::ViewsDelegate> views_delegate_;
-  aura::TestWindowTreeClientSetup window_tree_client_setup_;
-  std::unique_ptr<WindowManagerApplication> window_manager_app_;
-  std::unique_ptr<aura::WindowTreeClientPrivate> window_tree_client_private_;
-
-  // Id for the next Display created by CreateRootWindowController().
-  int64_t next_display_id_ = 1;
-
-  std::unique_ptr<base::SequencedWorkerPoolOwner> blocking_pool_owner_;
-
-  std::unique_ptr<ui::InputDeviceClient> input_device_client_;
-
-  DISALLOW_COPY_AND_ASSIGN(WmTestHelper);
-};
-
-}  // namespace mus
-}  // namespace ash
-
-#endif  // ASH_MUS_TEST_WM_TEST_HELPER_H_