Refactor PanelLayoutManager to use aura::LayoutManager

ash/test/wm_window_test_api.h

 // 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_TEST_WM_WINDOW_TEST_API_H_
 #define ASH_TEST_WM_WINDOW_TEST_API_H_
 
 #include "ash/common/wm_window.h"
 
 namespace ash {
 
 class WmWindowTestApi {
  public:
   // Used by tests to set the default value of
   // |WmWindow::default_use_empty_minimum_size_for_testing_|. This is needed
   // as tests don't have a good way to reset the value of
   // |use_empty_minimum_size_for_testing_| before the minimum size is queried.
   class GlobalMinimumSizeLock {
    public:
     GlobalMinimumSizeLock();
     ~GlobalMinimumSizeLock();
 
    private:
     // Number of instances of GlobalMinimumSizeLock that have been created.
     static int instance_count_;
 
     DISALLOW_COPY_AND_ASSIGN(GlobalMinimumSizeLock);
   };
 
-  explicit WmWindowTestApi(WmWindow* window) : window_(window) {}
+  WmWindowTestApi() {}
   ~WmWindowTestApi() {}
 
-  void set_use_empty_minimum_size(bool value) {
-    window_->use_empty_minimum_size_for_testing_ = true;
-  }
-
  private:
   static void SetDefaultUseEmptyMinimumSizeForTesting(bool value);
 
-  WmWindow* window_;
-
   DISALLOW_COPY_AND_ASSIGN(WmWindowTestApi);
 };
 
 }  // namespace ash
 
 #endif  // ASH_TEST_WM_WINDOW_TEST_API_H_