[Media Router] Handle multiple Presentation URLs when creating routes

chrome/browser/media/router/media_source_unittest.cc

 // Copyright 2015 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 "chrome/browser/media/router/media_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media_router {
 
 // Test that the object's getters match the constructor parameters.
 TEST(MediaSourceTest, Constructor) {
   MediaSource source1("urn:x-com.google.cast:application:DEADBEEF");
   EXPECT_EQ("urn:x-com.google.cast:application:DEADBEEF", source1.id());
+  EXPECT_EQ(GURL(""), source1.url());
+}
+
+TEST(MediaSourceTest, ConstructorWithGURL) {
+  GURL test_url = GURL("http://google.com");
+  MediaSource source1(test_url);
+  EXPECT_EQ(test_url.spec(), source1.id());
+  EXPECT_EQ(test_url, source1.url());
 }
 
 }  // namespace media_router