Add the onBeforeNavigate and onErrorOccured events to the webNavigation API.

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 85 matching lines @@
     LOAD_START,
 
     // A content load has stopped. The source will be a
     // Source<NavigationController> corresponding to the tab in which the load
     // is occurring.  Details in the form of a LoadNotificationDetails object
     // are optional.
     LOAD_STOP,
 
     // A frame is staring a provisional load.  The source is a
     // Source<NavigationController> corresponding to the tab in which the load
-    // occurs.  Details is a bool specifying if the load occurs in the main
-    // frame (or a sub-frame if false).
+    // occurs.  Details is a ProvisionalLoadDetails object.
     FRAME_PROVISIONAL_LOAD_START,
 
+    // The provisional load for a frame was committed. The source is a
+    // NavigationController corresponding to the tab in which the load occured.
+    // Details is a ProvisionalLoadDetails object. In contrast to
+    // NAV_ENTRY_COMMITTED, this notification is sent when the load was
+    // committed, even if no navigation entry was committed (such as
+    // AUTO_SUBFRAME navigations).
+    FRAME_PROVISIONAL_LOAD_COMMITTED,
+
     // Content was loaded from an in-memory cache.  The source will be a
     // Source<NavigationController> corresponding to the tab in which the load
     // occurred.  Details in the form of a LoadFromMemoryCacheDetails object
     // are provided.
     LOAD_FROM_MEMORY_CACHE,
 
     // A provisional content load has failed with an error.  The source will be
     // a Source<NavigationController> corresponding to the tab in which the
     // load occurred.  Details in the form of a ProvisionalLoadDetails object
     // are provided.
@@ skipping 1076 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_