MacViews: Encapsulate some Aura specifics in widget_unittest.cc

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>
+
+#include "ui/views/widget/root_view.h"
+
+namespace views {
+namespace test {
+
+// static
+void WidgetTest::SimulateNativeDestroy(Widget* widget) {
+  DCHECK([widget->GetNativeWindow() isReleasedWhenClosed]);
+  [widget->GetNativeWindow() close];
+}
+
+// static
+bool WidgetTest::IsNativeWindowVisible(gfx::NativeWindow window) {
+  return [window isVisible];
+}
+
+// static
+ui::EventProcessor* WidgetTest::GetEventProcessor(Widget* widget) {
+  return static_cast<internal::RootView*>(widget->GetRootView());
+}
+
+}  // namespace test
+}  // namespace views