[ash] Add TYPE_DIALOG and its item's LauncherContextMenu

ash/shell/shelf_delegate_impl.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_SHELL_SHELF_DELEGATE_IMPL_H_
 #define ASH_SHELL_SHELF_DELEGATE_IMPL_H_
 
 #include "ash/shelf/shelf_delegate.h"
 #include "base/compiler_specific.h"
 
@@ skipping 15 matching lines @@
 
   // ShelfDelegate overrides:
   virtual void OnLauncherCreated(Launcher* launcher) OVERRIDE;
   virtual void OnLauncherDestroyed(Launcher* launcher) OVERRIDE;
   virtual LauncherID GetLauncherIDForAppID(const std::string& app_id) OVERRIDE;
   virtual const std::string& GetAppIDForLauncherID(LauncherID id) OVERRIDE;
   virtual void PinAppWithID(const std::string& app_id) OVERRIDE;
   virtual bool IsAppPinned(const std::string& app_id) OVERRIDE;
   virtual bool CanPin() const OVERRIDE;
   virtual void UnpinAppWithID(const std::string& app_id) OVERRIDE;
+  virtual bool CanUserModifyShelfAutoHideBehavior(
+      aura::Window* root_window) const OVERRIDE;
 
  private:
   // Used to update Launcher. Owned by main.
   WindowWatcher* watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfDelegateImpl);
 };
 
 }  // namespace shell
 }  // namespace ash
 
 #endif  // ASH_SHELL_SHELF_DELEGATE_IMPL_H_