Dart: Removes need to call listen().

mojo/public/dart/src/application_connection.dart

 // 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.
 
 part of application;
 
 typedef Object ServiceFactory(core.MojoMessagePipeEndpoint endpoint);
 typedef void FallbackServiceFactory(
     String interfaceName, core.MojoMessagePipeEndpoint endpoint);
 
 class LocalServiceProvider implements ServiceProvider {
   final ApplicationConnection connection;
   ServiceProviderStub _stub;
 
   LocalServiceProvider(this.connection, this._stub) {
+    assert(_stub.isOpen);
     _stub.impl = this;
   }
 
-  listen({Function onClosed}) => _stub.listen(onClosed: _closer(onClosed));
-
-  Function _closer(Function onClosed) {
-    return (() {
-      if (onClosed != null) {
-        onClosed();
-      }
-      close();
-    });
+  set onError(Function f) {
+    _stub.onError = f;
   }
 
   void close({bool nodefer: false}) => _stub.close(nodefer: nodefer);
 
   void connectToService(
       String interfaceName, core.MojoMessagePipeEndpoint pipe) {
     if (connection._nameToServiceFactory.containsKey(interfaceName)) {
       connection._nameToServiceFactory[interfaceName](pipe);
       return;
     }
@@ skipping 26 matching lines @@
 // fallbackServiceFactory function doesn't bind the pipe, it should close it.
 //
 // The fallbackServiceFactory is only used if a service wasn't specified
 // with provideService().
 
 class ApplicationConnection {
   ServiceProviderProxy remoteServiceProvider;
   LocalServiceProvider _localServiceProvider;
   final _nameToServiceFactory = new Map<String, ServiceFactory>();
   FallbackServiceFactory _fallbackServiceFactory;
+  core.ErrorHandler onError;
 
-  ApplicationConnection(ServiceProviderStub stub, ServiceProviderProxy proxy)
-      : remoteServiceProvider = proxy {
-    if (stub != null) _localServiceProvider =
-        new LocalServiceProvider(this, stub);
+  ApplicationConnection(ServiceProviderStub stub, this.remoteServiceProvider) {
+    if (stub != null) {
+      _localServiceProvider = new LocalServiceProvider(this, stub);
+      _localServiceProvider.onError = _errorHandler;
+    }
   }
 
   FallbackServiceFactory get fallbackServiceFactory => _fallbackServiceFactory;
   set fallbackServiceFactory(FallbackServiceFactory f) {
     assert(_localServiceProvider != null);
     _fallbackServiceFactory = f;
   }
 
   bindings.ProxyBase requestService(bindings.ProxyBase proxy) {
     assert(!proxy.impl.isBound &&
         (remoteServiceProvider != null) &&
         remoteServiceProvider.impl.isBound);
     var pipe = new core.MojoMessagePipe();
     proxy.impl.bind(pipe.endpoints[0]);
     remoteServiceProvider.ptr.connectToService(proxy.name, pipe.endpoints[1]);
     return proxy;
   }
 
   void provideService(String interfaceName, ServiceFactory factory) {
     assert(_localServiceProvider != null);
     _nameToServiceFactory[interfaceName] = factory;
   }
 
-  void listen({Function onClosed}) {
-    assert(_localServiceProvider != null);
-    _localServiceProvider.listen(onClosed: _closer(onClosed));
-  }
-
-  Function _closer(Function onClosed) {
-    return (() {
-      if (onClosed != null) {
-        onClosed();
-      }
-      close();
-    });
+  void _errorHandler() {
+    if (onError != null) onError();
+    close();
   }
 
   void close({bool nodefer: false}) {
     if (remoteServiceProvider != null) {
       remoteServiceProvider.close();
       remoteServiceProvider = null;
     }
     if (_localServiceProvider != null) {
       _localServiceProvider.close(nodefer: nodefer);
       _localServiceProvider = null;
     }
   }
 }