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

chrome/browser/ui/cocoa/profiles/avatar_base_controller.h

 // Copyright 2014 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_PROFILES_AVATAR_BASE_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_BASE_CONTROLLER_H_
 
 #import <AppKit/AppKit.h>
 
 #import "base/mac/scoped_nsobject.h"
@@ skipping 21 matching lines @@
   // Observer that listens for updates to the ProfileInfoCache.
   scoped_ptr<ProfileInfoUpdateObserver> profileInfoObserver_;
 }
 
 // The avatar button view.
 @property(readonly, nonatomic) NSButton* buttonView;
 
 // Designated initializer.
 - (id)initWithBrowser:(Browser*)browser;
 
+// Called by BrowserWindowController when the Browser is being destroyed.
+- (void)browserWillBeDestroyed;
+
 // Shows the avatar bubble in the given mode.
 - (void)showAvatarBubbleAnchoredAt:(NSView*)anchor
                           withMode:(BrowserWindow::AvatarBubbleMode)mode
                    withServiceType:(signin::GAIAServiceType)serviceType;
 
 - (void)closeAvatarBubble;
 @end
 
 @interface AvatarBaseController (ExposedForTesting)
 - (BaseBubbleController*)menuController;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_BASE_CONTROLLER_H_