[ash] Add TYPE_DIALOG and its item's LauncherContextMenu

ash/shelf/shelf_delegate.h

 // Copyright 2013 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_SHELF_SHELF_DELEGATE_H_
 #define ASH_SHELF_SHELF_DELEGATE_H_
 
 #include "ash/ash_export.h"
 #include "ash/launcher/launcher_types.h"
 
+namespace aura {
+class Window;
+}
+
 namespace ash {
 class Launcher;
 
 // Delegate for the Launcher.
 class ASH_EXPORT ShelfDelegate {
  public:
   // Launcher owns the delegate.
   virtual ~ShelfDelegate() {}
 
   // Callback used to allow delegate to perform initialization actions that
@@ skipping 17 matching lines @@
 
   // Check if the app with |app_id_| is pinned to the launcher.
   virtual bool IsAppPinned(const std::string& app_id) = 0;
 
   // Checks whether the user is allowed to pin/unpin apps. Pinning may be
   // disallowed by policy in case there is a pre-defined set of pinned apps.
   virtual bool CanPin() const = 0;
 
   // Unpins app item with |app_id|.
   virtual void UnpinAppWithID(const std::string& app_id) = 0;
+
+  // Returns |true| if the user is allowed to modify the shelf auto-hide
+  // behavior on |root_window|.
+  virtual bool CanUserModifyShelfAutoHideBehavior(
+      aura::Window* root_window) const = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_DELEGATE_H_