Show a warning when the history files can't be read correctly....

chrome/common/notification_type.h

 // Copyright (c) 2009 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_
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
 //
@@ skipping 500 matching lines @@
     //
     // The source is the profile owning the history service that changed, and
     // the details is history::URLsDeletedDetails that lists the deleted URLs.
     HISTORY_URLS_DELETED,
 
     // Sent by history when the favicon of a URL changes.  The source is the
     // profile, and the details is history::FavIconChangeDetails (see
     // history_notifications.h).
     FAVICON_CHANGED,
 
-    // Sent by history if the history database is too new.  The active browser
-    // window should notify the user of this error.
-    HISTORY_TOO_NEW,
+    // Sent by history if there is a problem reading the profile.  The details
+    // is an int that's one of the message IDs in the string table.  The active
+    // browser window should notify the user of this error.
+    PROFILE_ERROR,
 
     // Thumbnails---------------------------------------------------------------
 
     // Set by ThumbnailStore when it was finished loading data from disk on
     // startup.
     THUMBNAIL_STORE_READY,
 
     // Bookmarks ---------------------------------------------------------------
 
     // Sent when the starred state of a URL changes. A URL is starred if there
@@ skipping 238 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_