Converts ash/wm/mru_window_tracker_unittest.cc to use AshTest

services/ui/public/cpp/window.cc

 // Copyright 2014 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 "services/ui/public/cpp/window.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 535 matching lines @@
     parent_->LocalRemoveChild(this);
 
   // We may still have children. This can happen if the embedder destroys the
   // root while we're still alive.
   while (!children_.empty()) {
     Window* child = children_.front();
     LocalRemoveChild(child);
     DCHECK(children_.empty() || children_.front() != child);
   }
 
+  // Notify observers before clearing properties (order matches aura::Window).
+  FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowDestroyed(this));
+
   // Clear properties.
   for (auto& pair : prop_map_) {
     if (pair.second.deallocator)
       (*pair.second.deallocator)(pair.second.value);
   }
   prop_map_.clear();
 
-  FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowDestroyed(this));
-
   // Invoke after observers so that can clean up any internal state observers
   // may have changed.
   if (window_tree())
     window_tree()->OnWindowDestroyed(this);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Window, private:
 
 Window::Window(WindowTreeClient* client, Id id)
@@ skipping 353 matching lines @@
     notifier->NotifyWindowReordered();
 
   return true;
 }
 
 // static
 Window** Window::GetStackingTarget(Window* window) {
   return &window->stacking_target_;
 }
 }  // namespace ui