Implement all system menu title row buttons for Ash MD

ash/common/system/tray/tray_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 ASH_COMMON_SYSTEM_TRAY_TRAY_CONSTANTS_H_
 #define ASH_COMMON_SYSTEM_TRAY_TRAY_CONSTANTS_H_
 
 #include "ash/ash_export.h"
 
 typedef unsigned int SkColor;
@@ skipping 75 matching lines @@
 
 // The size and foreground color of the icons appearing in the material design
 // system tray.
 extern const int kTrayIconSize;
 extern const SkColor kTrayIconColor;
 
 // The size and foreground color of the icons appearing in the material design
 // system menu.
 extern const int kMenuIconSize;
 extern const SkColor kMenuIconColor;
+extern const SkColor kMenuIconColorDisabled;
 // The size of buttons in the system menu.
 extern const int kMenuButtonSize;
 // The vertical padding for the system menu separator.
 extern const int kMenuSeparatorVerticalPadding;
 // The horizontal padding for the system menu separator.
 extern const int kMenuExtraMarginFromLeftEdge;
 
 enum TrayConstant {
   // A legacy height value used in non-MD calculations for applying additional
   // borders on tray items.
@@ skipping 24 matching lines @@
 int GetTrayConstant(TrayConstant constant);
 
 namespace test {
 const int kSettingsTrayItemViewId = 10000;
 const int kAccessibilityTrayItemViewId = 10001;
 }  // namespace test
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_CONSTANTS_H_