Introduce proximity_auth component.

components/proximity_auth/proximity_auth_system_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 "components/proximity_auth/proximity_auth_system.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace proximity_auth {
+
+TEST(ProximityAuthSystemTest, GetRemoteDevices) {
+  RemoteDevice device1 = { "device 1" };
+  RemoteDevice device2 = { "device 2" };
+
+  RemoteDeviceList device_list;
+  device_list.push_back(device1);
+  device_list.push_back(device2);
+
+  ProximityAuthSystem system(device_list);
+
+  const RemoteDeviceList& returned_list = system.GetRemoteDevices();
+  EXPECT_EQ(2u, returned_list.size());

[Ilya Sherman, 2014/08/27 03:18:33]

nit: This should be an ASSERT_EQ, as otherwise the test could crash on the
following lines.

[Tim Song, 2014/08/27 19:40:05]

Done.

+  EXPECT_EQ(device1.name, returned_list[0].name);
+  EXPECT_EQ(device2.name, returned_list[1].name);
+}
+
+}  // namespace proximity_auth