Send a notification when the signed-in user is about to sign out.

chrome/common/chrome_notification_types.h

 // Copyright (c) 2012 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_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 
 #include "build/build_config.h"
 #include "content/public/browser/notification_types.h"
 
@@ skipping 903 matching lines @@
   // Sent when a user signs into Google services such as sync.
   // The source is the Profile. The details are a
   // GoogleServiceSigninSuccessDetails object.
   NOTIFICATION_GOOGLE_SIGNIN_SUCCESSFUL,
 
   // Sent when a user fails to sign into Google services such as sync.
   // The source is the Profile. The details are a GoogleServiceAuthError
   // object.
   NOTIFICATION_GOOGLE_SIGNIN_FAILED,
 
+  // Sent when the currently signed-in user will sign out.
+  // The source is the Profile. The details are a
+  // GoogleServiceSignoutDetails object.
+  NOTIFICATION_GOOGLE_WILL_SIGN_OUT,
+
   // Sent when the currently signed-in user for a user has been signed out.
   // The source is the Profile. The details are a
   // GoogleServiceSignoutDetails object.
   NOTIFICATION_GOOGLE_SIGNED_OUT,
 
   // Autofill Notifications --------------------------------------------------
 
   // Sent when a popup with Autofill suggestions is shown in the renderer.
   // The source is the corresponding RenderViewHost. There are not details.
   NOTIFICATION_AUTOFILL_DID_SHOW_SUGGESTIONS,
@@ skipping 330 matching lines @@
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 
 #endif  // CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_