Dart: Removes name conflicts from generated bindings.

mojo/public/dart/src/event_stream.dart

Index: mojo/public/dart/src/event_stream.dart
diff --git a/mojo/public/dart/src/event_stream.dart b/mojo/public/dart/src/event_stream.dart
index 610285a358d3eed64f1e5f6c4d236a1b0bb203c6..6669ac1e156ffcd1fad86711274a4707e10baf4a 100644
--- a/mojo/public/dart/src/event_stream.dart
+++ b/mojo/public/dart/src/event_stream.dart
@@ -4,7 +4,7 @@
 
 part of core;
 
-class MojoEventStream extends Stream<int> {
+class MojoEventStream extends Stream<List<int>> {
   // The underlying Mojo handle.
   MojoHandle _handle;
 
@@ -118,11 +118,7 @@ class MojoEventStream extends Stream<int> {
   String toString() => "$_handle";
 }
 
-abstract class Listener {
-  StreamSubscription<List<int>> listen();
-}
-
-class MojoEventStreamListener implements Listener {
+class MojoEventStreamListener {
   MojoMessagePipeEndpoint _endpoint;
   MojoEventStream _eventStream;
   bool _isOpen = false;