Revert 212459 "Remove TextDatabase from the history service."

trunk/src/chrome/browser/history/text_database.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 <limits>
 #include <set>
 #include <string>
 
 #include "chrome/browser/history/text_database.h"
 
@@ skipping 333 matching lines @@
 
     // Compute the snippet based on those matches.
     std::string body = statement.ColumnString(4);
     match.snippet.ComputeSnippet(match_positions, body);
   }
   statement.Reset(true);
   return result_count > options.EffectiveMaxCount();
 }
 
 }  // namespace history