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

device/serial/serial.mojom

Index: device/serial/serial.mojom
diff --git a/device/serial/serial.mojom b/device/serial/serial.mojom
index 23b12b374a512d98926ed54ac4edd0f540517664..048944e0278f9f171aefc3301d68c9d44ed2e722 100644
--- a/device/serial/serial.mojom
+++ b/device/serial/serial.mojom
@@ -2,6 +2,8 @@
 // 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 {
@@ -88,7 +90,9 @@ interface SerialService {
   // 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 {