Implement the host side of serial connection I/O on data pipe.

device/serial/serial.mojom

 // 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.
 
+import "data_stream.mojom"
+
 module device.serial {
 
 struct DeviceInfo {
   string? path;
   uint16 vendor_id;
   bool has_vendor_id = false;
   uint16 product_id;
   bool has_product_id = false;
   string? display_name;
 };
@@ skipping 66 matching lines @@
 
 interface SerialService {
   GetDevices() => (DeviceInfo[] devices);
 
   // Creates a |Connection| to |path| with options specified by |options|,
   // returning it via |connection|. This will fail and |connection| will not be
   // usable if |path| does not specify a valid serial device or there is an
   // error connecting to or configuring the connection.
   Connect(string path,
           ConnectionOptions options,
-          Connection& connection);
+          Connection& connection,
+          DataSink& sink,
+          DataSource& source);

[raymes, 2014/08/22 04:57:43]

Perhaps a comment for what sink and source are for?

[Sam McNally, 2014/08/22 08:12:12]

Done.

 };
 
 interface Connection {
   GetInfo() => (ConnectionInfo? info);
   SetOptions(ConnectionOptions options) => (bool success);
   SetControlSignals(HostControlSignals signals) => (bool success);
   GetControlSignals() => (DeviceControlSignals signals);
   Flush() => (bool success);
 };
 
 }