cros: CustomFrameViewAsh avatar icon from a window prop

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"
@@ skipping 37 matching lines @@
 // of value is an int.
 AURA_EXPORT extern const WindowProperty<bool>* const kAnimationsDisabledKey;
 
 // A property key to store the app icon, typically larger for shelf icons, etc.
 AURA_EXPORT extern const WindowProperty<gfx::ImageSkia*>* const kAppIconKey;
 
 // A property key to store the type of window that will be used to record
 // pointer metrics. See AppType in ash/shared/app_types.h for more details.
 AURA_EXPORT extern const WindowProperty<int>* const kAppType;
 
+// A property key to store the avatar icon that will be displayed on the window
+// frame to indicate the owner of the window when needed.
+AURA_EXPORT extern const WindowProperty<gfx::ImageSkia*>* const kAvatarIconKey;
+
 // A property key to store if a window is a constrained window or not.
 AURA_EXPORT extern const WindowProperty<bool>* const kConstrainedWindowKey;
 
 // A property key to store if a window was created by a user gesture.
 AURA_EXPORT extern const WindowProperty<bool>* const kCreatedByUserGesture;
 
 // A property key to indicate that a window should show that it deserves
 // attention.
 AURA_EXPORT extern const WindowProperty<bool>* const kDrawAttentionKey;
 
@@ skipping 71 matching lines @@
 
 AURA_EXPORT extern const WindowProperty<ui::mojom::WindowType>* const
     kWindowTypeKey;
 
 // Alphabetical sort.
 
 }  // namespace client
 }  // namespace aura
 
 #endif  // UI_AURA_CLIENT_AURA_CONSTANTS_H_