[Mac] Show a warning in the new avatar button/menu if there's an auth error

chrome/browser/ui/cocoa/profiles/profile_chooser_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_PROFILE_CHOOSER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_CHOOSER_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 #include <map>
 #include <string>
@@ skipping 82 matching lines @@
 // Shows the signin tab in the browser.
 - (IBAction)showTabbedSigninPage:(id)sender;
 
 // Adds an account to the active profile.
 - (IBAction)addAccount:(id)sender;
 
 // Shows the account removal view to confirm removing the currently selected
 // account from the active profile if possible.
 - (IBAction)showAccountRemovalView:(id)sender;
 
+// Shows the account reauthentication view to re-sign in the currently selected
+// account from the active profile if possible.
+- (IBAction)showAccountReauthView:(id)sender;
+
 // Removes the current account |accountIdToRemove_|.
 - (IBAction)removeAccount:(id)sender;
 
 // Reset the WebContents used by the Gaia embedded view.
 - (void)cleanUpEmbeddedViewContents;
 @end
 
 // Testing API /////////////////////////////////////////////////////////////////
 
 @interface ProfileChooserController (ExposedForTesting)
 - (id)initWithBrowser:(Browser*)browser
            anchoredAt:(NSPoint)point
              withMode:(profiles::BubbleViewMode)mode;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_CHOOSER_CONTROLLER_H_