MacViews: Fix child window z-order and SetBounds

ui/views/test/widget_test_mac.mm

 // 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 "ui/views/test/widget_test.h"
 
 #include <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "ui/views/widget/root_view.h"
 
 namespace views {
 namespace test {
 
 // static
 void WidgetTest::SimulateNativeDestroy(Widget* widget) {
   // Retain the window while closing it, otherwise the window may lose its last
   // owner before -[NSWindow close] completes (this offends AppKit). Usually
   // this reference will exist on an event delivered to the runloop.
   base::scoped_nsobject<NSWindow> window([widget->GetNativeWindow() retain]);
   [window close];
 }
 
 // static
 bool WidgetTest::IsNativeWindowVisible(gfx::NativeWindow window) {
   return [window isVisible];
 }
 
 // static
+bool WidgetTest::IsWindowStackedAbove(Widget* above, Widget* below) {
+  EXPECT_TRUE(above->IsVisible());
+  EXPECT_TRUE(below->IsVisible());
+
+  // -[NSApplication orderedWindows] are ordered front-to-back.
+  NSWindow* first = above->GetNativeWindow();
+  NSWindow* second = below->GetNativeWindow();
+
+  for (NSWindow* window in [NSApp orderedWindows]) {
+    if (window == second)
+      return !first;
+
+    if (window == first)
+      first = nil;
+  }
+  return false;
+}
+
+// static
 ui::EventProcessor* WidgetTest::GetEventProcessor(Widget* widget) {
   return static_cast<internal::RootView*>(widget->GetRootView());
 }
 
 }  // namespace test
 }  // namespace views