cros: Fix user image change crash

chrome/browser/ui/webui/settings/profile_info_handler.h

Index: chrome/browser/ui/webui/settings/profile_info_handler.h
diff --git a/chrome/browser/ui/webui/settings/profile_info_handler.h b/chrome/browser/ui/webui/settings/profile_info_handler.h
index c7919c49b7331350492978b88472c51b6b1ef65e..6aa21f0e8b99773e1b0e6c3dc7356c548f70f9cb 100644
--- a/chrome/browser/ui/webui/settings/profile_info_handler.h
+++ b/chrome/browser/ui/webui/settings/profile_info_handler.h
@@ -16,8 +16,6 @@
 
 #if defined(OS_CHROMEOS)
 #include "components/user_manager/user_manager.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
 #else
 #include "chrome/browser/profiles/profile_statistics_common.h"
 #endif
@@ -86,6 +84,11 @@ class ProfileInfoHandler : public SettingsPageUIHandler,
   // Weak pointer.
   Profile* profile_;
 
+#if defined(OS_CHROMEOS)
+  ScopedObserver<user_manager::UserManager, ProfileInfoHandler>
+      user_manager_observer_;
+#endif
+
   ScopedObserver<ProfileAttributesStorage, ProfileInfoHandler>
       profile_observer_;