Dart: Adds a content handler and a test.

mojo/public/dart/src/application.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 bindings;
+
+// The Application interface doesn't explicitly have a Shell as a Client, but
+// that is what is at the other end of the MessagePipe.
+abstract class Application extends application.ApplicationInterface
+                           with shell.ShellCalls {
+  List<service_provider.ServiceProviderClient> _clients;
+  List<ServiceProvider> _providers;
+
+  Application(core.MojoMessagePipeEndpoint endpoint) :
+      _clients = [],
+      _providers = [],
+      super(endpoint);
+
+  Application.fromHandle(int shellHandle) :
+      _clients = [],
+      _providers = [],
+      super.fromHandle(shellHandle);
+
+  Function interfaceFactoryClosure();
+
+  void initialize(List<String> args) {
+  }
+
+  void acceptConnection(
+      String requestorUrl, core.MojoHandle serviceProviderHandle) {

[abarth-chromium, 2015/01/10 04:46:25]

Can this have a stronger type?  Ideally the bindings would have already wrapped
the handle in the service provider interface.

[zra, 2015/01/16 00:33:40]

Better types added with https://codereview.chromium.org/851173002/

+    var serviceProviderEndpoint =
+        new core.MojoMessagePipeEndpoint(serviceProviderHandle);
+    var serviceProvider =
+        new ServiceProvider(serviceProviderEndpoint, interfaceFactoryClosure());
+    serviceProvider.listen();
+    _providers.add(serviceProvider);

[abarth-chromium, 2015/01/10 04:46:25]

What's this about?

[zra, 2015/01/16 00:33:40]

Removed

+  }
+
+  core.MojoMessagePipeEndpoint connectToService(String url, String service) {
+    var serviceProviderPipe = new core.MojoMessagePipe();
+    var applicationPipe = new core.MojoMessagePipe();
+    var clientEndpoint = applicationPipe.endpoints[0];
+    var applicationEndpoint = applicationPipe.endpoints[1];
+    var serviceProviderClient = new service_provider.ServiceProviderClient(
+        serviceProviderPipe.endpoints[0]);
+    serviceProviderClient.open();
+    callConnectToApplication(url, serviceProviderPipe.endpoints[1].handle);
+    serviceProviderClient.callConnectToService(
+        service, applicationEndpoint.handle);
+    _clients.add(serviceProviderClient);
+    return clientEndpoint;
+  }
+
+  void close() {
+    _providers.forEach((p) => p.close());
+    _providers.clear();
+    _clients.forEach((c) => c.close());
+    _clients.clear();
+    super.close();
+  }
+}
+
+
+abstract class ClientApplication extends Application {

[abarth-chromium, 2015/01/10 04:46:25]

What's the difference between a ClientApplication and an Application?

[zra, 2015/01/16 00:33:40]

Added a comment. Will remove if this turns out not to be useful.

+  ClientApplication(core.MojoMessagePipeEndpoint endpoint) : super(endpoint);
+
+  ClientApplication.fromHandle(int shellHandle) : super.fromHandle(shellHandle);
+
+  Function interfaceFactoryClosure() => () => null;
+
+  void initialize(List<String> args) {
+    run(args);
+  }
+
+  void acceptConnection(
+      String requestorUrl, core.MojoHandle serviceProviderHandle) {
+  }
+
+  run(List<String> args) async;
+}