Changed DB to store node positions as Ordinals.

sql/statement.h

 // 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.
 
 #ifndef SQL_STATEMENT_H_
 #define SQL_STATEMENT_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "sql/connection.h"
 #include "sql/sql_export.h"
 
 namespace sql {
 
-// Possible return values from ColumnType in a statement. These should match
-// the values in sqlite3.h.
-enum ColType {
-  COLUMN_TYPE_INTEGER = 1,
-  COLUMN_TYPE_FLOAT = 2,
-  COLUMN_TYPE_TEXT = 3,
-  COLUMN_TYPE_BLOB = 4,
-  COLUMN_TYPE_NULL = 5,
-};
-
 // Normal usage:
 //   sql::Statement s(connection_.GetUniqueStatement(...));
 //   s.BindInt(0, a);
 //   if (s.Step())
 //     return s.ColumnString(0);
 //
 //   If there are errors getting the statement, the statement will be inert; no
 //   mutating or database-access methods will work. If you need to check for
 //   validity, use:
 //   if (!s.is_valid())
@@ skipping 141 matching lines @@
 
   // See Succeeded() for what this holds.
   bool succeeded_;
 
   DISALLOW_COPY_AND_ASSIGN(Statement);
 };
 
 }  // namespace sql
 
 #endif  // SQL_STATEMENT_H_