[ash] Add TYPE_DIALOG and its item's LauncherContextMenu

ash/launcher/launcher_types.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_LAUNCHER_LAUNCHER_TYPES_H_
 #define ASH_LAUNCHER_LAUNCHER_TYPES_H_
 
 #include <vector>
 
 #include "ash/ash_export.h"
@@ skipping 17 matching lines @@
 
   // The browser shortcut button.
   TYPE_BROWSER_SHORTCUT,
 
   // Represents a platform app.
   TYPE_PLATFORM_APP,
 
   // Represents a windowed V1 browser app.
   TYPE_WINDOWED_APP,
 
+  // Represents a dialog.
+  TYPE_DIALOG,
+
   // Default value.
   TYPE_UNDEFINED,
 };
 
 // Represents the status of pinned or running app launcher items.
 enum LauncherItemStatus {
   // A closed LauncherItem, i.e. has no live instance.
   STATUS_CLOSED,
   // A LauncherItem that has live instance.
   STATUS_RUNNING,
@@ skipping 39 matching lines @@
   // Resource id of the image to display on the shelf.
   int image_resource_id;
 
   // Title of the item.
   base::string16 title;
 };
 
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_LAUNCHER_TYPES_H_