Remove fake client creation from DBusClients' Create() functions.

chromeos/dbus/shill_device_client_unittest.cc

Index: chromeos/dbus/shill_device_client_unittest.cc
diff --git a/chromeos/dbus/shill_device_client_unittest.cc b/chromeos/dbus/shill_device_client_unittest.cc
index bce00dd90fb88407948da018c9dec30a32789776..b2ad508f8dd29c4a2b3450cdd26cbcbda5f14432 100644
--- a/chromeos/dbus/shill_device_client_unittest.cc
+++ b/chromeos/dbus/shill_device_client_unittest.cc
@@ -59,7 +59,7 @@ class ShillDeviceClientTest : public ShillClientUnittestBase {
   virtual void SetUp() {
     ShillClientUnittestBase::SetUp();
     // Create a client with the mock bus.
-    client_.reset(ShillDeviceClient::Create(REAL_DBUS_CLIENT_IMPLEMENTATION));
+    client_.reset(ShillDeviceClient::Create());
     client_->Init(mock_bus_.get());
     // Run the message loop to run the signal connection result callback.
     message_loop_.RunUntilIdle();