Update the AvatarMenu when a supervised user's custodian info changes.

chrome/browser/profiles/avatar_menu.h

Index: chrome/browser/profiles/avatar_menu.h
diff --git a/chrome/browser/profiles/avatar_menu.h b/chrome/browser/profiles/avatar_menu.h
index f319a32cd8f750094d2c5829b0ca49fcd2c2c44d..27bb15676540a774d104e8e10fb532b9a5ded9ee 100644
--- a/chrome/browser/profiles/avatar_menu.h
+++ b/chrome/browser/profiles/avatar_menu.h
@@ -19,6 +19,10 @@
 #include "content/public/browser/web_contents_observer.h"
 #include "ui/gfx/image/image.h"
 
+#if defined(ENABLE_MANAGED_USERS)
+#include "chrome/browser/supervised_user/supervised_user_service_observer.h"
+#endif
+
 class AvatarMenuObserver;
 class Browser;
 class Profile;
@@ -31,7 +35,11 @@ class AvatarMenuActions;
 // browser window frame. This class will notify its observer when the backend
 // data changes, and the view for this model should forward actions
 // back to it in response to user events.
-class AvatarMenu : public content::NotificationObserver {
+class AvatarMenu :
+#if defined(ENABLE_MANAGED_USERS)
+    public SupervisedUserServiceObserver,
+#endif
+    public content::NotificationObserver {
  public:
   // Represents an item in the menu.
   struct Item {
@@ -142,6 +150,11 @@ class AvatarMenu : public content::NotificationObserver {
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
+#if defined(ENABLE_MANAGED_USERS)
+  // SupervisedUserServiceObserver:
+  virtual void OnCustodianInfoChanged() OVERRIDE;
+#endif
+
   // The model that provides the list of menu items.
   scoped_ptr<ProfileList> profile_list_;