Add RemoteDeviceLoader to create RemoteDevice from CryptAuth data.

components/proximity_auth/proximity_monitor_impl_unittest.cc

Index: components/proximity_auth/proximity_monitor_impl_unittest.cc
diff --git a/components/proximity_auth/proximity_monitor_impl_unittest.cc b/components/proximity_auth/proximity_monitor_impl_unittest.cc
index 12f74ed15b9f741a2d363e589efa1396a34a953d..a1784539de170f851e447a4213e08a1193056136 100644
--- a/components/proximity_auth/proximity_monitor_impl_unittest.cc
+++ b/components/proximity_auth/proximity_monitor_impl_unittest.cc
@@ -29,6 +29,7 @@ using testing::SaveArg;
 namespace proximity_auth {
 namespace {
 
+const char kRemoteDeviceUserId[] = "example@gmail.com";
 const char kBluetoothAddress[] = "AA:BB:CC:DD:EE:FF";
 const char kRemoteDevicePublicKey[] = "Remote Public Key";
 const char kRemoteDeviceName[] = "LGE Nexus 5";
@@ -82,7 +83,8 @@ class ProximityAuthProximityMonitorImplTest : public testing::Test {
                                  kBluetoothAddress,
                                  false /* paired */,
                                  true /* connected */),
-        monitor_(RemoteDevice(kRemoteDeviceName,
+        monitor_(RemoteDevice(kRemoteDeviceUserId,
+                              kRemoteDeviceName,
                               kRemoteDevicePublicKey,
                               kBluetoothAddress,
                               kPersistentSymmetricKey),
@@ -534,8 +536,8 @@ TEST_F(ProximityAuthProximityMonitorImplTest,
        RecordProximityMetricsOnAuthSuccess_UnknownValues) {
   // Note: A device without a recorded name will have its Bluetooth address as
   // its name.
-  RemoteDevice unnamed_remote_device(kBluetoothAddress, kRemoteDevicePublicKey,
-                                     kBluetoothAddress,
+  RemoteDevice unnamed_remote_device(kRemoteDeviceUserId, kBluetoothAddress,
+                                     kRemoteDevicePublicKey, kBluetoothAddress,
                                      kPersistentSymmetricKey);
 
   scoped_ptr<base::TickClock> clock(new base::SimpleTestTickClock());