Propagates window type properties during aura-mus window creation

ui/aura/client/aura_constants.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_AURA_CLIENT_AURA_CONSTANTS_H_
 #define UI_AURA_CLIENT_AURA_CONSTANTS_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
 #include "ui/base/ui_base_types.h"
 
 namespace ui {
 class InputMethod;
+namespace mojom {
+enum class WindowType;
+}
 }
 
 namespace aura {
 namespace client {
 
 // Alphabetical sort.
 
 // A property key to store always-on-top flag.
 AURA_EXPORT extern const WindowProperty<bool>* const kAlwaysOnTopKey;
 
@@ skipping 66 matching lines @@
 // view is the tab strip for tabbed browser windows, the toolbar for popups,
 // the web contents for app windows and varies for fullscreen windows.
 AURA_EXPORT extern const aura::WindowProperty<int>* const kTopViewInset;
 
 // The color of the window header.
 AURA_EXPORT extern const aura::WindowProperty<SkColor>* const kTopViewColor;
 
 // A property key to store the window icon, typically 16x16 for title bars.
 AURA_EXPORT extern const WindowProperty<gfx::ImageSkia*>* const kWindowIconKey;
 
+struct AURA_EXPORT WindowTypeProperty {
+  ui::mojom::WindowType type;
+};
+
+AURA_EXPORT extern const aura::WindowProperty<WindowTypeProperty*>* const

[msw, 2016/11/21 19:26:46]

Can we avoid the struct via aura::WindowProperty<ui::mojom::WindowType>?

[sky, 2016/11/21 22:13:56]

I went with the struct so that I can tell whether the value was set of not. But
adding UNKNOWN means I can use it as the default and nuke the struct.

+    kWindowTypeKey;
+
 // Alphabetical sort.
 
 }  // namespace client
 }  // namespace aura
 
 #endif  // UI_AURA_CLIENT_AURA_CONSTANTS_H_