Cleanup: Remove unneeded headers from app/

chrome/browser/history/visitsegment_database.cc

 // 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.
 
 #include "chrome/browser/history/visitsegment_database.h"
 
 #include <math.h>
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
-#include "app/sql/connection.h"
 #include "app/sql/statement.h"
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/history/page_usage_data.h"
 
 // The following tables are used to store url segment information.
 //
 // segments
@@ skipping 353 matching lines @@
       NOTREACHED();
       r = false;
     }
     delete_usage.Reset();
     delete_seg.Reset();
   }
   return r;
 }
 
 }  // namespace history