[Mac] Inform reference counted objects that hold a weak Browser* when the Browser is being destroye…

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 66 matching lines @@
 
 // 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;
 
+// Called by BrowserWindowController when the Browser is being destroyed.
+- (void)browserWillBeDestroyed;
+
 // Update the display of all buttons.
 - (void)update;
 
 // Returns the current number of browser action buttons within the container,
 // whether or not they are displayed.
 - (NSUInteger)buttonCount;
 
 // Returns the current number of browser action buttons displayed in the
 // container.
 - (NSUInteger)visibleButtonCount;
@@ skipping 23 matching lines @@
 // Sets whether or not the overflow container is focused in the wrench menu.
 - (void)setFocusedInOverflow:(BOOL)focused;
 
 @end  // @interface BrowserActionsController
 
 @interface BrowserActionsController(TestingAPI)
 - (BrowserActionButton*)buttonWithIndex:(NSUInteger)index;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTIONS_CONTROLLER_H_