Clean up pref change notification handling.

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 718 matching lines @@
 
     // Notification triggered when a web application has been installed or
     // uninstalled. Any application view should reload its data.  The source is
     // the profile. No details are provided.
     WEB_APP_INSTALL_CHANGED,
 
     // This is sent to a pref observer when a pref is changed. The source is the
     // PrefService and the details a std::string of the changed path.
     PREF_CHANGED,
 
+    // This is broadcast after the preference subsystem has completed
+    // asynchronous initalization of a PrefService.
+    PREF_INITIALIZATION_COMPLETED,
+
     // Sent when a default request context has been created, so calling
     // Profile::GetDefaultRequestContext() will not return NULL.  This is sent
     // on the thread where Profile::GetRequestContext() is first called, which
     // should be the UI thread.
     DEFAULT_REQUEST_CONTEXT_AVAILABLE,
 
     // The state of a web resource has been changed. A resource may have been
     // added, removed, or altered. Source is WebResourceService, and the
     // details are NoDetails.
     WEB_RESOURCE_STATE_CHANGED,
@@ skipping 573 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_