Create a message filter for message port messages. This allows a nice cleanu...

chrome/common/notification_type.h

 // Copyright (c) 2010 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_NOTIFICATION_TYPE_H_
 #define CHROME_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 165 matching lines @@
 
     // The SSL state of the browser has changed in some internal way.  For
     // example, the user might have explicitly allowed some broken certificate
     // or a secure origin might have included some insecure content.  Listen to
     // this notifiation if you need to keep track of our internal SSL state.
     //
     // The source will be the navigation controller associated with the state
     // change.  There are no details.
     SSL_INTERNAL_STATE_CHANGED,
 
-    // Lets resource handlers and other interested observers know when the
-    // message filter is being deleted and can no longer be used.  This will
-    // also get sent if the renderer crashes (and in that case, it'll be sent
-    // twice).
-    RESOURCE_MESSAGE_FILTER_SHUTDOWN,
-
-    // Lets interested observers know when a WorkerProcessHost is being deleted
-    // and can no longer be used.
-    WORKER_PROCESS_HOST_SHUTDOWN,
-
     // Views -------------------------------------------------------------------
 
     // Notification that a view was removed from a view hierarchy.  The source
     // is the view, the details is the parent view.
     VIEW_REMOVED,
 
     // Browser-window ----------------------------------------------------------
 
     // This message is sent after a window has been opened.  The source is a
     // Source<Browser> containing the affected Browser.  No details are
@@ skipping 1134 matching lines @@
 };
 
 inline bool operator==(NotificationType::Type a, NotificationType b) {
   return a == b.value;
 }
 inline bool operator!=(NotificationType::Type a, NotificationType b) {
   return a != b.value;
 }
 
 #endif  // CHROME_COMMON_NOTIFICATION_TYPE_H_