Revert of Hook up ProximityAuthSystem in EasyUnlockService.

components/proximity_auth/proximity_auth_system_unittest.cc

Index: components/proximity_auth/proximity_auth_system_unittest.cc
diff --git a/components/proximity_auth/proximity_auth_system_unittest.cc b/components/proximity_auth/proximity_auth_system_unittest.cc
index c9c676e167c8e3ecb7d0d2b8959554570895b918..b29f85ffa507cd9c5413f49106646983aa1aba74 100644
--- a/components/proximity_auth/proximity_auth_system_unittest.cc
+++ b/components/proximity_auth/proximity_auth_system_unittest.cc
@@ -9,7 +9,23 @@
 namespace proximity_auth {
 
 TEST(ProximityAuthSystemTest, GetRemoteDevices) {
-  // TODO(tengs): Reimplement this test.
+  RemoteDevice device1("example@gmail.com", "device1", "public_key1",
+                       RemoteDevice::BLUETOOTH_CLASSIC, "bt_addr1", "psk1", "");
+  RemoteDevice device2("example@gmail.com", "device2", "public_key2",
+                       RemoteDevice::BLUETOOTH_LE, "bt_addr2", "psk2", "");
+
+  std::vector<RemoteDevice> device_list;
+  device_list.push_back(device1);
+  device_list.push_back(device2);
+
+  ProximityAuthSystem system(device_list);
+
+  const std::vector<RemoteDevice>& returned_list = system.GetRemoteDevices();
+  ASSERT_EQ(2u, returned_list.size());
+  EXPECT_EQ(device1.name, returned_list[0].name);
+  EXPECT_EQ(device1.public_key, returned_list[0].public_key);
+  EXPECT_EQ(device2.name, returned_list[1].name);
+  EXPECT_EQ(device2.public_key, returned_list[1].public_key);
 }
 
 }  // namespace proximity_auth