Add search_terms_replacement_key field to TemplateURL.

chrome/browser/webdata/keyword_table.h

Index: chrome/browser/webdata/keyword_table.h
diff --git a/chrome/browser/webdata/keyword_table.h b/chrome/browser/webdata/keyword_table.h
index ff1385ae8f6daf2b67460e4771bbc2b89ea5676f..3f86d6509dab2476b84b6b5d21217d4eb1ad74a3 100644
--- a/chrome/browser/webdata/keyword_table.h
+++ b/chrome/browser/webdata/keyword_table.h
@@ -53,6 +53,10 @@ class Statement;
 //                          version 39.
 //   alternate_urls         See TemplateURLData::alternate_urls. This was added
 //                          in version 47.
+//   search_terms_replacement_key
+//                          See TemplateURLData::search_terms_replacement_key.
+//                          This was added in version 48.
+//
 //
 // keywords_backup          The full copy of the |keywords| table. Added in
 //                          version 43. Must be in sync with |keywords|
@@ -146,6 +150,7 @@ class KeywordTable : public WebDatabaseTable {
   bool MigrateToVersion44AddDefaultSearchProviderBackup();
   bool MigrateToVersion45RemoveLogoIDAndAutogenerateColumns();
   bool MigrateToVersion47AddAlternateURLsColumn();
+  bool MigrateToVersion48AddSearchTermsReplacementKeyColumn();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(KeywordTableTest, DefaultSearchProviderBackup);