MacViews: Fix child window z-order and SetBounds

ui/views/test/widget_test.h

 // 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.
 
 #ifndef UI_VIEWS_TEST_WIDGET_TEST_H_
 #define UI_VIEWS_TEST_WIDGET_TEST_H_
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/test/views_test_base.h"
 
@@ skipping 75 matching lines @@
   View* GetMouseMoveHandler(internal::RootView* root_view);
 
   View* GetGestureHandler(internal::RootView* root_view);
 
   // Simulate a OS-level destruction of the native widget held by |widget|.
   static void SimulateNativeDestroy(Widget* widget);
 
   // Return true if |window| is visible according to the native platform.
   static bool IsNativeWindowVisible(gfx::NativeWindow window);
 
+  // Return true if |above| is higher than |below| in the native window Z-order.
+  // Both windows must be visible.
+  static bool IsWindowStackedAbove(Widget* above, Widget* below);
+
   // Return the event processor for |widget|. On aura platforms, this is an
   // aura::WindowEventDispatcher. Otherwise, it is a bridge to the OS event
   // processor.
   static ui::EventProcessor* GetEventProcessor(Widget* widget);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WidgetTest);
 };
 
 }  // namespace test
 }  // namespace views
 
 #endif  // UI_VIEWS_TEST_WIDGET_TEST_H_