Remove NOTIFICATION_HISTORY_URLS_DELETED

chrome/browser/history/expire_history_backend_unittest.cc

 // Copyright (c) 2012 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.
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 91 matching lines @@
   ExpireHistoryBackend expirer_;
 
   scoped_ptr<HistoryDatabase> main_db_;
   scoped_ptr<ThumbnailDatabase> thumb_db_;
   TestingProfile profile_;
   scoped_refptr<TopSites> top_sites_;
 
   // Time at the beginning of the test, so everybody agrees what "now" is.
   const Time now_;
 
-  // Details received from HistoryObserver events.
   typedef std::vector<URLRows> URLsModifiedNotificationList;
   URLsModifiedNotificationList urls_modified_notifications_;
 
   typedef std::vector<std::pair<bool, URLRows>> URLsDeletedNotificationList;
   URLsDeletedNotificationList urls_deleted_notifications_;
 
  private:
   void SetUp() override {
     ASSERT_TRUE(tmp_dir_.CreateUniqueTempDir());
 
@@ skipping 743 matching lines @@
   EXPECT_TRUE(all->Read(now, main_db_.get(), &visits, 1));
   EXPECT_EQ(1U, visits.size());
 }
 
 // TODO(brettw) add some visits with no URL to make sure everything is updated
 // properly. Have the visits also refer to nonexistent FTS rows.
 //
 // Maybe also refer to invalid favicons.
 
 }  // namespace history