Use template specialization to generate WindowProperty code

ui/views/widget/desktop_aura/desktop_native_widget_property.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 "ui/aura/window_property.h"
+#include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
+
+DECLARE_WINDOW_PROPERTY_TYPE(views::DesktopNativeWidgetAura*);
+
+namespace views {
+
+DEFINE_WINDOW_PROPERTY_KEY(DesktopNativeWidgetAura*,
+                           kDesktopNativeWidgetAuraKey, NULL);
+
+// static
+DesktopNativeWidgetAura* DesktopNativeWidgetAura::ForWindow(
+    aura::Window* window) {
+  return window->GetProperty(kDesktopNativeWidgetAuraKey);
+}
+
+// static
+void DesktopNativeWidgetAura::SetForWindow(
+    aura::Window* window,
+    DesktopNativeWidgetAura* desktop_native_widget) {
+  window->SetProperty(kDesktopNativeWidgetAuraKey, desktop_native_widget);
+}
+
+}  // namespace views