Move IsValidOriginIdentifier into appropriate header

storage/browser/database/database_util.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 "storage/browser/database/database_util.h"
 
 #include <stddef.h>
 
 #include "base/strings/utf_string_conversions.h"
 #include "storage/browser/database/database_tracker.h"
@@ skipping 83 matching lines @@
     full_path = full_path.InsertBeforeExtensionASCII(
         base::UTF16ToASCII(sqlite_suffix));
   }
   // Watch out for directory traversal attempts from a compromised renderer.
   if (full_path.value().find(FILE_PATH_LITERAL("..")) !=
           base::FilePath::StringType::npos)
     return base::FilePath();
   return full_path;
 }
 
-bool DatabaseUtil::IsValidOriginIdentifier(
-    const std::string& origin_identifier) {
-  return GetOriginFromIdentifier(origin_identifier).is_valid();
-}
-
 }  // namespace storage