[Extensions Toolbar Mac] Implement drag-and-drop for the overflow menu

chrome/browser/ui/cocoa/extensions/browser_actions_controller.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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
@@ skipping 46 matching lines @@
 
   // The chevron button used when Browser Actions are hidden.
   base::scoped_nsobject<MenuButton> chevronMenuButton_;
 
   // The Browser Actions overflow menu.
   base::scoped_nsobject<NSMenu> overflowMenu_;
 }
 
 @property(readonly, nonatomic) BrowserActionsContainerView* containerView;
 @property(readonly, nonatomic) Browser* browser;
+@property(readonly, nonatomic) BOOL isOverflow;
 
 // Initializes the controller given the current browser and container view that
 // will hold the browser action buttons. If |mainController| is nil, the created
 // BrowserActionsController will be the main controller; otherwise (if this is
 // for the overflow menu), |mainController| should be controller of the main bar
 // for the |browser|.
 - (id)initWithBrowser:(Browser*)browser
         containerView:(BrowserActionsContainerView*)container
        mainController:(BrowserActionsController*)mainController;
 
@@ skipping 26 matching lines @@
 @end  // @interface BrowserActionsController
 
 @interface BrowserActionsController(TestingAPI)
 - (BrowserActionButton*)buttonWithIndex:(NSUInteger)index;
 - (ToolbarActionsBar*)toolbarActionsBar;
 + (BrowserActionsController*)fromToolbarActionsBarDelegate:
     (ToolbarActionsBarDelegate*)delegate;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTROLLER_H_