Add HttpServerConnection to 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
index 9e93387e4137c5a295a285cac7b8e102450f770b..c0196b240c0860f51656bcb41926a26f344cdd99 100644
--- a/runtime/bin/vmservice/client/lib/src/elements/io_view.dart
+++ b/runtime/bin/vmservice/client/lib/src/elements/io_view.dart
@@ -77,6 +77,45 @@ class IOHttpServerViewElement extends ObservatoryElement {
   }
 }
 
+@CustomTag('io-http-server-connection-view')
+class IOHttpServerConnectionViewElement extends ObservatoryElement {
+  @published ServiceMap connection;
+  Timer _updateTimer;
+
+  IOHttpServerConnectionViewElement.created() : super.created();
+
+  void refresh(var done) {
+    connection.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;
+    }
+  }
+}
+
+@CustomTag('io-http-server-connection-ref')
+class IOHttpServerConnectionRefElement extends ServiceRefElement {
+  IOHttpServerConnectionRefElement.created() : super.created();
+}
+
 @CustomTag('io-socket-ref')
 class IOSocketRefElement extends ServiceRefElement {
   IOSocketRefElement.created() : super.created();