Fix user agent override restore pipeline

content/public/browser/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 CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 #define CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
 //
@@ skipping 303 matching lines @@
   // the id returned from ExecuteJavascriptInWebFrameNotifyResult and the
   // Value the results of the javascript expression. The Value is owned by
   // RenderViewHost and may be a Null Value.
   NOTIFICATION_EXECUTE_JAVASCRIPT_RESULT,
 
   // Notification from WebContents that we have received a response from the
   // renderer in response to a dom automation controller action. The source is
   // the RenderViewHost, and the details is a DomOperationNotificationDetails.
   NOTIFICATION_DOM_OPERATION_RESPONSE,
 
+  // Notification from WebContents that its user agent override has been
+  // changed.
+  NOTIFICATION_WEB_CONTENTS_USER_AGENT_OVERRIDE_CHANGED,

[Charlie Reis, 2012/08/15 17:24:23]

John is typically against adding new notifications, but given that
SessionService appears to depend on them, this seems ok to me.

+
   // Child Processes ---------------------------------------------------------
 
   // This notification is sent when a child process host has connected to a
   // child process.  There is no usable source, since it is sent from an
   // ephemeral task; register for AllSources() to receive this notification.
   // The details are in a Details<ChildProcessData>.
   NOTIFICATION_CHILD_PROCESS_HOST_CONNECTED,
 
   // This message is sent after a ChildProcessHost is disconnected from the
   // child process.  There is no usable source, since it is sent from an
@@ skipping 34 matching lines @@
   // of a temporary zoom level change, the details is an empty string.
   NOTIFICATION_ZOOM_LEVEL_CHANGED,
 
   // Custom notifications used by the embedder should start from here.
   NOTIFICATION_CONTENT_END,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_