Update from https://crrev.com/306655

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, constructValidFileOrigin) {
+  Origin origin("file://");
+  EXPECT_EQ("file://", origin.string());
+}
+
 TEST(OriginTest, constructValidOriginWithoutPort) {
   Origin origin("wss://example2.com");
   EXPECT_EQ("wss://example2.com", origin.string());
 }
 
 }  // namespace
 
 }  // namespace url