[Mac] Replace the custom bookmark menus with native NSMenus.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_hover_state.h

-// Copyright (c) 2011 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.
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/memory/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/bookmarks/bookmark_button.h"
-
-// Hover state machine.  Encapsulates the hover state for
-// BookmarkBarFolderController.
-// A strict call order is implied with these calls.  It is ONLY valid to make
-// the following state transitions:
-// From:            To:               Via:
-// closed           opening           scheduleOpen...:
-// opening          closed            cancelPendingOpen...: or
-//                  open              scheduleOpen...: completes.
-// open             closing           scheduleClose...:
-// closing          open              cancelPendingClose...: or
-//                  closed            scheduleClose...: completes.
-//
-@interface BookmarkBarFolderHoverState : NSObject {
- @private
-  // Enumeration of the valid states that the |hoverButton_| member can be in.
-  // Because the opening and closing of hover views can be done asyncronously
-  // there are periods where the hover state is in transtion between open and
-  // closed.  During those times of transition the opening or closing operation
-  // can be cancelled.  We serialize the opening and closing of the
-  // |hoverButton_| using this state information.  This serialization is to
-  // avoid race conditions where one hover button is being opened while another
-  // is closing.
-  enum HoverState {
-    kHoverStateClosed = 0,
-    kHoverStateOpening = 1,
-    kHoverStateOpen = 2,
-    kHoverStateClosing = 3
-  };
-
-  // Like normal menus, hovering over a folder button causes it to
-  // open.  This variable is set when a hover is initiated (but has
-  // not necessarily fired yet).
-  scoped_nsobject<BookmarkButton> hoverButton_;
-
-  // We model hover state as a state machine with specific allowable
-  // transitions.  |hoverState_| is the state of this machine at any
-  // given time.
-  HoverState hoverState_;
-}
-
-// Designated initializer.
-- (id)init;
-
-// The BookmarkBarFolderHoverState decides when it is appropriate to hide
-// and show the button that the BookmarkBarFolderController drags over.
-- (NSDragOperation)draggingEnteredButton:(BookmarkButton*)button;
-
-// The BookmarkBarFolderHoverState decides the fate of the hover button
-// when the BookmarkBarFolderController's view is exited.
-- (void)draggingExited;
-
-@end
-
-// Exposing these for unit testing purposes.  They are used privately in the
-// implementation as well.
-@interface BookmarkBarFolderHoverState(PrivateAPI)
-// State change APIs.
-- (void)scheduleCloseBookmarkFolderOnHoverButton;
-- (void)cancelPendingCloseBookmarkFolderOnHoverButton;
-- (void)scheduleOpenBookmarkFolderOnHoverButton:(BookmarkButton*)hoverButton;
-- (void)cancelPendingOpenBookmarkFolderOnHoverButton;
-@end
-
-// Exposing these for unit testing purposes.  They are used only in tests.
-@interface BookmarkBarFolderHoverState(TestingAPI)
-// Accessors and setters for button and hover state.
-- (BookmarkButton*)hoverButton;
-- (HoverState)hoverState;
-@end