Remove history dependency from content.

content/common/notification_type.h

 // Copyright (c) 2011 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_COMMON_NOTIFICATION_TYPE_H_
 #define CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 311 matching lines @@
     // TAB_CONTENTS_DISCONNECTED notification is guaranteed before the
     // source pointer becomes junk.  No details are expected.
     TAB_CONTENTS_SWAPPED,
 
     // This message is sent after a TabContents is disconnected from the
     // renderer process.  The source is a Source<TabContents> with a pointer to
     // the TabContents (the pointer is usable).  No details are expected.
     TAB_CONTENTS_DISCONNECTED,
 
     // This notification is sent after TabContents' title is updated. The source
-    // is a Source<TabContents> with a pointer to the TabContents. No details
-    // are expected.
+    // is a Source<TabContents> with a pointer to the TabContents. The details
+    // is a Details<TitleUpdatedDetails> that contains more information.
     TAB_CONTENTS_TITLE_UPDATED,
 
     // This message is sent when a new InfoBar has been added to a TabContents.
     // The source is a Source<TabContents> with a pointer to the TabContents
     // the InfoBar was added to. The details is a Details<InfoBarDelegate> with
     // a pointer to an object implementing the InfoBarDelegate interface for
     // the InfoBar that was added.
     TAB_CONTENTS_INFOBAR_ADDED,
 
     // This message is sent when an InfoBar is about to be removed from a
@@ skipping 974 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  // CONTENT_COMMON_NOTIFICATION_TYPE_H_