Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/presenters/menu_presentation_controller.h

+// Copyright 2016 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.
+
+// ======                        New Architecture                         =====
+// =         This code is only used in the new iOS Chrome architecture.       =
+// ============================================================================
+
+#ifndef IOS_CHROME_BROWSER_UI_PRESENTERS_MENU_PRESENTATION_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_PRESENTERS_MENU_PRESENTATION_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+// A presentation controller for presenting a "menu" interface: a (usually)
+// rectangular presentation that covers part of the window, and which doesn't
+// obscure the presenting view. The presenting view remains in the view
+// hierarchy. If the presenting view controller confroms to the
+// MenuPresentationDelegate protocol, that protocol will be used to determine
+// the region the menu appears in. Otherwise a default rectangular area is
+// used.
+@interface MenuPresentationController : UIPresentationController
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_PRESENTERS_MENU_PRESENTATION_CONTROLLER_H_