| // Copyright 2014 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 "url/origin.h" | 
 |  | 
 | #include "base/strings/string_util.h" | 
 |  | 
 | namespace url { | 
 |  | 
 | Origin::Origin() : string_("null") {} | 
 |  | 
 | Origin::Origin(const std::string& origin) : string_(origin) { | 
 |   DCHECK(origin == "null" || MatchPattern(origin, "?*://?*")); | 
 |   DCHECK_GT(origin.size(), 0u); | 
 |   DCHECK(origin == "file://" || origin[origin.size() - 1] != '/'); | 
 | } | 
 |  | 
 | }  // namespace url |