Dart: Adds optional named arguments for creating bindings.

mojo/public/dart/src/stub.dart

Index: mojo/public/dart/src/stub.dart
diff --git a/mojo/public/dart/src/stub.dart b/mojo/public/dart/src/stub.dart
index 1ce098239cec317e1093c564d98eb7a319e1f890..e9824580ebe85facab676a1116ccc8fd9cff3eed 100644
--- a/mojo/public/dart/src/stub.dart
+++ b/mojo/public/dart/src/stub.dart
@@ -8,9 +8,13 @@ abstract class Stub extends core.MojoEventStreamListener {
   int _outstandingResponseFutures = 0;
   bool _isClosing = false;
 
-  Stub(core.MojoMessagePipeEndpoint endpoint) : super(endpoint);
+  Stub.fromEndpoint(core.MojoMessagePipeEndpoint endpoint,
+      {bool doListen: true, Function onClosed}) :
+      super.fromEndpoint(endpoint, doListen: doListen, onClosed: onClosed);
 
-  Stub.fromHandle(core.MojoHandle handle) : super.fromHandle(handle);
+  Stub.fromHandle(core.MojoHandle handle,
+      {bool doListen: true, Function onClosed}) :
+      super.fromHandle(handle, doListen: doListen, onClosed: onClosed);
 
   Stub.unbound() : super.unbound();