Add WindowPinType property on arua::Window

services/ui/public/interfaces/window_manager_constants.mojom

 // Copyright 2015 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.
 
 module ui.mojom;
 
 import "ui/display/mojo/display.mojom";
 import "ui/gfx/geometry/mojo/geometry.mojom";
 
 enum WindowManagerErrorCode {
   SUCCESS,
   ACCESS_DENIED
 };
 
 // TODO(sky): seems like this should not be defined in mus, rather in mash.
 // Only thing mus cares about is minimized and that should be expressed
 // differently.
 enum ShowState {
   DEFAULT,
   NORMAL,
   MINIMIZED,
   MAXIMIZED,
   INACTIVE,
   FULLSCREEN,
 };
 
+enum WindowPinType {
+  NONE,
+  PINNED,
+  TRUSTED_PINNED,
+};
+
 const int32 kResizeBehaviorNone = 0;
 const int32 kResizeBehaviorCanResize = 1;
 const int32 kResizeBehaviorCanMaximize = 2;
 const int32 kResizeBehaviorCanMinimize = 4;
 
 struct FrameDecorationValues {
   gfx.mojom.Insets normal_client_area_insets;
   gfx.mojom.Insets maximized_client_area_insets;
   // Max width needed to display the buttons on the title bar. The buttons are
   // aligned to the trailing edge of the titlebar.
@@ skipping 21 matching lines @@
   PANEL,
   WINDOW_FRAMELESS,
   CONTROL,
   POPUP,
   MENU,
   TOOLTIP,
   BUBBLE,
   DRAG,
   UNKNOWN,
 };