Move Time, TimeDelta and TimeTicks into namespace base.

chrome/browser/history/history_backend.cc

 // Copyright (c) 2006-2008 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 "chrome/browser/history/history_backend.h"
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "chrome/browser/autocomplete/history_url_provider.h"
 #include "chrome/browser/bookmarks/bookmark_service.h"
 #include "chrome/browser/history/download_types.h"
 #include "chrome/browser/history/in_memory_history_backend.h"
 #include "chrome/browser/history/page_usage_data.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/notification_types.h"
 #include "chrome/common/sqlite_utils.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/registry_controlled_domain.h"
 
+using base::Time;
+using base::TimeDelta;
+using base::TimeTicks;
+
 /* The HistoryBackend consists of a number of components:
 
     HistoryDatabase (stores past 3 months of history)
       URLDatabase (stores a list of URLs)
       DownloadDatabase (stores a list of downloads)
       VisitDatabase (stores a list of visits for the URLs)
       VisitSegmentDatabase (stores groups of URLs for the most visited view).
 
     ArchivedDatabase (stores history older than 3 months)
       URLDatabase (stores a list of URLs)
@@ skipping 1790 matching lines @@
 }
 
 BookmarkService* HistoryBackend::GetBookmarkService() {
   if (bookmark_service_)
     bookmark_service_->BlockTillLoaded();
   return bookmark_service_;
 }
 
 }  // namespace history