Move IsValidOriginIdentifier into appropriate header

storage/browser/database/database_util.h

 // Copyright (c) 2010 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 STORAGE_BROWSER_DATABASE_DATABASE_UTIL_H_
 #define STORAGE_BROWSER_DATABASE_DATABASE_UTIL_H_
 
 #include <string>
 #include "base/strings/string16.h"
 #include "storage/browser/storage_browser_export.h"
@@ skipping 13 matching lines @@
 
   // Extract various information from a database vfs_file_name.  All return
   // parameters are optional.
   static bool CrackVfsFileName(const base::string16& vfs_file_name,
                                std::string* origin_identifier,
                                base::string16* database_name,
                                base::string16* sqlite_suffix);
   static base::FilePath GetFullFilePathForVfsFile(
       DatabaseTracker* db_tracker,
       const base::string16& vfs_file_name);
-  static bool IsValidOriginIdentifier(const std::string& origin_identifier);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_DATABASE_DATABASE_UTIL_H_