Introduce url::Origin to represent Web Origin.

url/serialized_origin.h

+// 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.
+
+#ifndef URL_SERIALIZED_ORIGIN_H_
+#define URL_SERIALIZED_ORIGIN_H_
+
+#include <iosfwd>
+#include <string>
+#include "url/url_export.h"
+
+// SerializedOrigin represents a Web Origin serialized to a string.
+// See RFC6454 for details.
+class URL_EXPORT SerializedOrigin {
+ public:
+  SerializedOrigin();
+  explicit SerializedOrigin(const std::string& origin);
+
+  const std::string& string() const { return string_; }
+
+  bool operator==(const SerializedOrigin& that) const {
+    return string_ == that.string_;
+  }
+
+ private:
+  std::string string_;
+};
+
+URL_EXPORT std::ostream& operator<<(std::ostream& out,
+                                    const SerializedOrigin& origin);
+
+#endif  // URL_SERIALIZED_ORIGIN_H_