Add media router common classes and unittests.

chrome/browser/media/router/media_route_factory_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_route.h"
+#include "chrome/browser/media/router/media_route_factory.h"
+#include "chrome/browser/media/router/media_source.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace media_router {
+
+TEST(MediaRouteFactoryTest, Create) {
+  MediaRouteFactory factory;
+  MediaRoute route1 =
+      factory.Create(ForDesktopMediaSource(), "sink", "desc", true);
+  EXPECT_EQ("route-local-0", route1.media_route_id());
+  EXPECT_EQ("sink", route1.sink_id());
+  EXPECT_EQ("desc", route1.description());
+  EXPECT_EQ(true, route1.is_local());
+
+  MediaRoute route2 =
+      factory.Create(ForTabMediaSource(1), "sink2", "desc2", false);
+  EXPECT_EQ("route-local-1", route2.media_route_id());
+  EXPECT_EQ("sink2", route2.sink_id());
+  EXPECT_EQ("desc2", route2.description());
+  EXPECT_EQ(false, route2.is_local());
+}
+
+}  // namespace media_router