Add the 'content' column to see what text is used to detect a language

chrome/common/language_detection_details.h

 // Copyright 2013 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 CHROME_COMMON_LANGUAGE_DETECTION_DETAILS_H_
 #define CHROME_COMMON_LANGUAGE_DETECTION_DETAILS_H_
 
 #include <string>
 
+#include "base/string16.h"
 #include "base/time.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_macros.h"
 
 struct LanguageDetectionDetails {
   LanguageDetectionDetails();
   ~LanguageDetectionDetails();
 
   // The time when this was created
   base::Time time;
 
   // The URL
   GURL url;
 
   // The language detected by the content
   std::string content_language;
 
   // The language detected by CLD
   std::string cld_language;
 
   // Whether the CLD detection is reliable or not
   bool is_cld_reliable;
 
   // The adopted language
   std::string adopted_language;
+
+  // The contents which is used for detection
+  string16 contents;
 };
 
 #endif  // CHROME_COMMON_LANGUAGE_DETECTION_DETAILS_H_