[Media Router] Add MediaSink subtypes

chrome/browser/media/router/discovery/media_sink_internal_unittest.cc

Index: chrome/browser/media/router/discovery/media_sink_internal_unittest.cc
diff --git a/chrome/browser/media/router/discovery/media_sink_internal_unittest.cc b/chrome/browser/media/router/discovery/media_sink_internal_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6d5e88b69d98335dd27d55ed2b2fec135533c559
--- /dev/null
+++ b/chrome/browser/media/router/discovery/media_sink_internal_unittest.cc
@@ -0,0 +1,16 @@
+// Copyright 2017 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/discovery/media_sink_internal.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace media_router {
+
+TEST(MediaSinkInternalTest, TestIsValidSinkId) {
+  EXPECT_FALSE(MediaSinkInternal::IsValidSinkId(""));
+  EXPECT_FALSE(MediaSinkInternal::IsValidSinkId("abc\x80"));
+  EXPECT_TRUE(MediaSinkInternal::IsValidSinkId("rjuKv_yxhY4jg7QBIp0kbngLjR6A"));
+}
+
+}  // namespace media_router