Introduce RootWindowProperty for RootWindow's properties

ash/root_window_settings.cc

+// 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.
+
+#include "ash/root_window_settings.h"
+
+#include "ui/aura/root_window.h"
+#include "ui/aura/window_property.h"
+#include "ui/gfx/display.h"
+
+DECLARE_WINDOW_PROPERTY_TYPE(ash::internal::RootWindowSettings*);
+
+namespace ash {
+namespace internal {
+
+DEFINE_OWNED_WINDOW_PROPERTY_KEY(RootWindowSettings,
+                                 kRootWindowSettingsKey, NULL);
+
+RootWindowSettings::RootWindowSettings()
+    : solo_window_header(false),
+      display_id(gfx::Display::kInvalidDisplayID),
+      controller(NULL) {
+}
+
+RootWindowSettings* InitRootWindowSettings(aura::RootWindow* root) {
+  RootWindowSettings* property = new RootWindowSettings();
+  root->SetProperty(kRootWindowSettingsKey, property);
+  return property;
+}
+
+RootWindowSettings* GetRootWindowSettings(aura::RootWindow* root) {
+  return root->GetProperty(kRootWindowSettingsKey);
+}
+
+const RootWindowSettings* GetRootWindowSettings(const aura::RootWindow* root) {
+  return root->GetProperty(kRootWindowSettingsKey);
+}
+
+}  // namespace internal
+}  // namespace ash