Add dart:io view to the observatory.

runtime/bin/vmservice/client/lib/src/elements/io_view.dart

Index: runtime/bin/vmservice/client/lib/src/elements/io_view.dart
diff --git a/runtime/bin/vmservice/client/lib/src/elements/io_view.dart b/runtime/bin/vmservice/client/lib/src/elements/io_view.dart
new file mode 100644
index 0000000000000000000000000000000000000000..0796775f8967da194b7edfa9dec7c8cc174fe882
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+++ b/runtime/bin/vmservice/client/lib/src/elements/io_view.dart
@@ -0,0 +1,73 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library io_view_element;
+
+import 'dart:async';
+import 'observatory_element.dart';
+import 'service_ref.dart';
+import 'package:observatory/service.dart';
+import 'package:polymer/polymer.dart';
+
+@CustomTag('io-view')
+class IOViewElement extends ObservatoryElement {
+  @published ServiceMap io;
+
+  IOViewElement.created() : super.created();
+
+  void refresh(var done) {
+    io.reload().whenComplete(done);
+  }
+}
+
+@CustomTag('io-http-server-list-view')
+class IOHttpServerListViewElement extends ObservatoryElement {
+  @published ServiceMap list;
+
+  IOHttpServerListViewElement.created() : super.created();
+
+  void refresh(var done) {
+    list.reload().whenComplete(done);
+  }
+}
+
+@CustomTag('io-http-server-ref')
+class IOHttpServerRefElement extends ServiceRefElement {
+  IOHttpServerRefElement.created() : super.created();
+}
+
+@CustomTag('io-http-server-view')
+class IOHttpServerViewElement extends ObservatoryElement {
+  // TODO(ajohnsen): Create a HttpServer object.
+  @published ServiceMap httpServer;
+  Timer _updateTimer;
+
+  IOHttpServerViewElement.created() : super.created();
+
+  void refresh(var done) {
+    httpServer.reload().whenComplete(done);
+  }
+
+  void _updateHttpServer() {
+    refresh(() {
+      if (_updateTimer != null) {
+        _updateTimer = new Timer(new Duration(seconds: 1), _updateHttpServer);
+      }
+    });
+  }
+
+  void enteredView() {
+    super.enteredView();
+    // Start a timer to update the isolate summary once a second.
+    _updateTimer = new Timer(new Duration(seconds: 1), _updateHttpServer);
+  }
+
+  void leftView() {
+    super.leftView();
+    if (_updateTimer != null) {
+      _updateTimer.cancel();
+      _updateTimer = null;
+    }
+  }
+}