Introduce url::Origin to represent Web Origin.

url/origin_unittest.cc

+// 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 "testing/gtest/include/gtest/gtest.h"
+#include "url/origin.h"
+
+namespace url {
+
+namespace {
+
+// Each test examines the Origin is constructed correctly without
+// violating DCHECKs.
+TEST(OriginTest, constructEmpty) {
+  Origin origin;
+  EXPECT_EQ("null", origin.string());
+}
+
+TEST(OriginTest, constructNull) {
+  Origin origin("null");
+  EXPECT_EQ("null", origin.string());
+}
+
+TEST(OriginTest, constructValidOrigin) {
+  Origin origin("http://example.com:8080");
+  EXPECT_EQ("http://example.com:8080", origin.string());
+}
+
+TEST(OriginTest, constructValidOriginWithoutPort) {
+  Origin origin("wss://example2.com");
+  EXPECT_EQ("wss://example2.com", origin.string());
+}
+
+}  // namespace
+
+}  // namespace url