Introduce RootWindowProperty for RootWindow's properties

ash/root_window_property.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_property.h"
+
+#include "ui/aura/root_window.h"
+#include "ui/aura/window_property.h"
+#include "ui/gfx/display.h"
+
+DECLARE_WINDOW_PROPERTY_TYPE(ash::internal::RootWindowProperty*);
+
+namespace ash {
+namespace internal {
+
+DEFINE_OWNED_WINDOW_PROPERTY_KEY(RootWindowProperty,
+                                 kRootWindowPropertyKey, NULL);
+
+RootWindowProperty::RootWindowProperty()
+    : solo_window_header(false),
+      display_id(gfx::Display::kInvalidDisplayID) {

[James Cook, 2013/08/30 00:06:36]

Initialize controller to NULL?

[oshima, 2013/08/30 05:38:33]

Done.

+}
+
+
+RootWindowProperty* GetRootWindowProperty(aura::RootWindow* root) {
+  RootWindowProperty* property = root->GetProperty(kRootWindowPropertyKey);
+  if (!property) {
+    property = new RootWindowProperty();
+    root->SetProperty(kRootWindowPropertyKey, property);
+  }
+  return property;
+}
+
+const RootWindowProperty* GetRootWindowProperty(const aura::RootWindow* root) {
+  return root->GetProperty(kRootWindowPropertyKey);
+}
+
+}  // namespace internal
+}  // namespace ash