[Mac] Implement an active state for the avatar button

chrome/browser/ui/cocoa/profiles/avatar_button_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_BUTTON_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_BUTTON_CONTROLLER_H_
 
 #import <AppKit/AppKit.h>
 
 #import "chrome/browser/ui/cocoa/profiles/avatar_base_controller.h"
 
 class Browser;
 
 // This view controller manages the button that sits in the top of the
 // window frame when using multi-profiles, and shows the current profile's
 // name. Clicking the button will open the profile menu.
 @interface AvatarButtonController : AvatarBaseController {
  @private
   BOOL isThemedWindow_;
   // Whether the signed in profile has an authentication error. Used to
   // display an error icon next to the button text.
   BOOL hasError_;
 }
 // Designated initializer.
 - (id)initWithBrowser:(Browser*)browser;
 
+// Overridden so that we can change the active state of the avatar button.
+- (void)showAvatarBubbleAnchoredAt:(NSView*)anchor
+                          withMode:(BrowserWindow::AvatarBubbleMode)mode
+                   withServiceType:(signin::GAIAServiceType)serviceType
+                   fromAccessPoint:(signin_metrics::AccessPoint)accessPoint;
+- (void)bubbleWillClose:(NSNotification*)notif;
+
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_BUTTON_CONTROLLER_H_