Remove mojo::InterfaceImpl from device/serial.

device/serial/serial_connection.cc

Index: device/serial/serial_connection.cc
diff --git a/device/serial/serial_connection.cc b/device/serial/serial_connection.cc
index 30e8fa65fbf3f1ebcfac56416c576865c58b3b53..6830cb39f3253074f6b29e099ea890fec8910030 100644
--- a/device/serial/serial_connection.cc
+++ b/device/serial/serial_connection.cc
@@ -16,8 +16,9 @@ SerialConnection::SerialConnection(
     scoped_refptr<SerialIoHandler> io_handler,
     mojo::InterfaceRequest<serial::DataSink> sink,
     mojo::InterfaceRequest<serial::DataSource> source,
-    mojo::InterfacePtr<serial::DataSourceClient> source_client)
-    : io_handler_(io_handler) {
+    mojo::InterfacePtr<serial::DataSourceClient> source_client,
+    mojo::InterfaceRequest<serial::Connection> request)
+    : io_handler_(io_handler), binding_(this, request.Pass()) {
   receiver_ = new DataSinkReceiver(
       sink.Pass(),
       base::Bind(&SerialConnection::OnSendPipeReady, base::Unretained(this)),